The statements contradictory to those of Kollmann are probably to be explained by the brevity of the observations.

Virchow ("Correspondenzblatt," S. 135), in his remarks upon this case, says: "I am convinced that every one who observes the microcephalic child will find that psychologically it has nothing whatever of the ape.

All the positive faculties and qualities of the ape are wanting here; there is nothing of the psychology of the ape, but only the psychology of an imperfectly developed and deficient little child. Every characteristic is human; every single trait. I had the girl in my room a few months since, for hours together, and occupied myself with her; I never observed anything in her that reminds me even remotely of the psychological conditions of apes. She is a human being, in a low stage of development, but in no way deviating from the nature of humanity."

From these reports it is plain to be seen that for all mental development an hereditary physical growth of the cerebrum is indispensable. If the sensuous impressions experienced anew in each case by each human being, and the original movements, were sufficient without the development of the cerebral convolutions and of the gray cortex, then these microcephalous beings, upon whom the same impressions operated as upon other new-born children, must have had better brains and must have learned more. But the brain, notwithstanding the peripheral impressions received in seeing, hearing, and feeling, could not grow, and so the rudimentary human child could not learn anything, and could not even form the ideas requisite for articulate voluntary movement, or combine these ideas. Only the motor centers of lower rank could be developed.

In peculiar contrast with these cases of genuine microcephaly stands the exceedingly remarkable case, observed by Dr. Rudolf Krause (Hamburg), of a boy whose brain is not at all morbidly affected or abnormally small, but exhibits decidedly the type of the brain of the ape. The discoverer reported upon it to the Anthropological Society ("Correspondenzblatt a.a. O., S. 132-135) the following facts among others:

"The skull and brain belonged to a boy who was born on the 4th of October, 1869, the last of four children. Paul was scrofulous from his youth. He did not get his teeth until the end of his second year, and they were quite brown in color and were soon lost. According to the statement of Paul's mother, he had several successive sets of teeth. It was not until the fifth year that he learned to walk. He was cleanly from the third year, but not when he felt ill. His appet.i.te was always good up to his last sickness of four weeks. His sleep was habitually undisturbed. He was of a cheerful temperament, and inclined to play; as soon as he heard music he would dance, and sing to the music in rather unmelodious tones. When teased he could be very violent; he would throw anything he could lay his hands on at the head of the offender. He liked the company of others, especially of men. By the time he was four years old he had learned to eat without help. Paul was very supple, was fond of climbing, and had great strength in his arms and hands especially; these had actually a h.o.r.n.y appearance, and thus reminded one of the hands of the chimpanzee. He could sit on the ground with his legs wide apart. His gait was uncertain, and he was apt to tumble; he ran with knees bent forward and legs crooked; he was fond of hopping, and seemed particularly ape-like when doing so. The great-toe of each foot stood off at an angle from the foot, and thus gave the impression of a prehensile toe. I thought at first that this deviation had its origin in the fact that the child, on account of his uncertainty in walking, wanted to get a broader basis of support; but I afterward gave up that opinion, because I have never found an instance of a similar habit in other children with diseased heads, e. g., hydrocephalous children. Paul could speak but little, could say hardly any words except _Papa_ and _Mama_, and even these he did not until late learn to p.r.o.nounce in two syllables; he uttered for the most part only sounds that resembled a grunt. He imitated the barking of a dog by the sound _rrrrrr_. He frequently stamped with feet and hands, clapped his hands together, and e.j.a.c.u.l.a.t.ed a sort of grunting sound, just as I have observed in the case of gorillas and chimpanzees.

"Paul was smaller than children of his age; on his right eye he had from his youth a large leucoma; the eyelids had generally a catarrhal affection, and were in a state of suppuration. The head looked sore; the forehead was small. Paul had a strongly marked tendency to imitation. His whole being, his movements, were strikingly ape-like. He was decidedly neglected by his parents, was generally dirty in appearance, and I really think the early death of the child was induced by the slight care taken of him. Paul was taken sick at the beginning of December, 1876, with an acute bronchial catarrh, and died on the 5th of January, 1877, at the age of seven and a quarter years.

"If you look at the cranium and the brain here, which belonged to the child just described, there are lacking in the first place all the characteristics of microcephaly. The cranium possesses a capacity of 1,022 cubic centimetres, and the brain weighs 950 grammes; they do not deviate, therefore, from the normal condition. But let the cranium, where it is laid open by the saw, be observed from within, and we notice an _asymmetry of the two hemispheres of the brain_; the cranium is pushed somewhat forward and to the right. The _partes...o...b..tales_ of the frontal bone are higher and more arched than is usual, in consequence of which the _lamina cribrosa_ of the ethmoid bone lies deeper, and room is given for the well-known conformation of the ethmoidal process in the brain. The cerebral convolutions are plainly marked upon the inner surface of the cranium. The facial cranium shows no deviations. There is no prognathism. The formation of the teeth alone is irregular; one pre-molar tooth is lacking above and below in the jaw, and, in fact, there is no place for it. The incisors and the pre-molar teeth are undergoing change.

"The two cerebral hemispheres are asymmetrical; in the region where the parieto-occipital fissure is situated on the left hemisphere, the two hemispheres diverge from each other and form an edge which curves outward and backward, so that the cerebellum remains uncovered. On the lower surface of the frontal lobes there exists a strongly marked ethmoidal prominence. Neither of the fissures of Sylvius is quite closed, the left less so than the right; the operculum is but slightly developed, and the island of Reil lies with its fissures almost entirely uncovered. This conformation reminds us throughout of the brain of the anthropoid apes. The two _sulci centrales sive fissurae Rolandi_ run straight to the border of the hemisphere, less deeply impressed than is normally the case, without forming an angle with each other. Very strongly and deeply impressed _sulci praecentrales_ seem to serve as subst.i.tutes for them. The _sulcus interparietalis,_ which begins farther outward than in the ordinary human being, receives the _sulcus parieto-occipitalis_--a structure in conformity with the typical brain of the ape. The _sulcus occipitalis transversus_, which is generally lightly stamped in man, extends here as a deep fissure across over the occipital lobe, thus producing a so-called simian fissure, and the posterior part of the occipital lobe has the appearance of an operculum. The _fissura calcarina_ has its origin directly on the surface of the occipital lobe, does not receive until late the _fissura parieto-occipitalis_, and goes directly, on the right side, into the _fissura hippocampi_. This abnormal structure also is typical for the brain of the ape.

"The _gyrus occipitalis primus_ is separated from the upper parietal lobe by the _sulcus parieto-occipitalis_, a formation that, according to Gratiolet, exists in many apes. The _gyrus temporalis superior_ is greatly reduced on both sides, and has an average breadth of only five millimetres; it is the one peculiarity that recalls emphatically the brain of the chimpanzee, which always has this reduced upper temporal convolution.

"We have here, then, a brain that scarcely deviates from the normal brain in volume, that possesses all the convolutions and fissures, seeming, perhaps, richer than the average brain in convolutions, and that is in every respect differentiated; and notwithstanding all this it approximates, in its whole structure, to the simian rather than to the human type. Had the brain been placed before me without my knowing its origin, I should have been perfectly justified in a.s.signing this brain to an anthropoid ape standing somewhat nearer to man than does the chimpanzee."

No second case of this sort has thus far been observed.

C.

REPORTS CONCERNING THE PROCESS OF LEARNING TO SEE, ON THE PART OF PERSONS BORN BLIND, BUT ACQUIRING SIGHT THROUGH SURGICAL TREATMENT. ALSO SOME CRITICAL REMARKS.

I. THE CHESSELDEN CASE.

The following extracts are taken from the report published by Will.

Chesselden in the "Philosophical Transactions for the Months of April, May, and June, 1728" (No. 402, London, pp. 447-450), or the "Philosophical Transactions from 1719 to 1733, abridged by J. Eames and J. Martyn" (vii, 3, pp. 491-493, London, 1734):

"Though we say of the gentleman that he was blind, as we do of all people who have ripe cataracts, yet they are never so blind from that cause but that they can discern day from night, and, for the most part, in a strong light distinguish black, white, and scarlet; but they can not perceive the shape of anything....

And thus it was with this young gentleman, who, though he knew these colors asunder in a good light, yet when he saw them after he was couched, the faint ideas he had of them before were not sufficient for him to know them by afterward, and therefore he did not think them the same which he had known before by those names....

"When he first saw, he was so far from making any judgment about distances, that he thought all objects whatever touched his eyes (as he expressed it) as what he felt did his skin, and thought no objects so agreeable as those which were smooth and regular.

He knew not the shape of anything nor any one thing from another, however different in shape or magnitude; but upon being told what things were, whose form he before knew from feeling, he would carefully observe, that he might know them again. But, having too many objects to learn at once, he forgot many of them, and (as he said) at first he learned to know and again forgot a thousand things in a day. Having often forgot which was the cat and which the dog, he was ashamed to ask; but catching the cat (which he knew by feeling), he was observed to look at her steadfastly, and then, setting her down, said, 'So, puss, I shall know you another time.' He was very much surprised that those things which he had liked best did not appear most agreeable to his eyes, expecting those persons would appear most beautiful that he loved most, and such things to be most agreeable to his sight that were so to his taste. We thought he soon knew what pictures represented which were showed to him, but we found afterward we were mistaken, for about two months after he was couched he discovered at once they represented solid bodies, when to that time he considered them only as party-colored planes or surfaces diversified with variety of paint; but even then he was no less surprised, expecting the pictures would feel like the things they represented, and was amazed when he found those parts, which by their light and shadow appeared now round and uneven, felt only flat like the rest, and asked which was the lying sense, feeling or seeing?

"Being shown his father's picture in a locket at his mother's watch and told what it was, he acknowledged a likeness, but was vastly surprised, asking how it could be that a large face could be expressed in so little room.

"At first he could bear but very little sight, and the things he saw he thought extremely large; but, upon seeing things larger, those first seen he conceived less, never being able to imagine any lines beyond the bounds he saw. The room he was in he said he knew to be but part of the house, yet he could not conceive that the whole house could look bigger. Before he was couched he expected little advantage from seeing, except reading and writing. Blindness, he observed, had this advantage, that he could go anywhere in the dark much better than those who could see, and after he had seen he did not soon lose this quality nor desire a light to go about the house in the night.

"A year after first seeing, being carried upon Epsom Downs and observing a large prospect, he was exceedingly delighted with it and called it a new kind of seeing; and now being lately couched of his other eye, he says that objects at first appeared large to this eye but not so large as they did at first to the other, and, looking upon the same object with both eyes, he thought it looked about twice as large as with the first couched eye only, but not double, that we can anywise discover."

Remark on the First Case.

Although this Chesselden case is the most famous of all, and the most frequently cited, it belongs, nevertheless, to those most inaccurately described. It is, however, not only the first in the order of time, but especially important for the reason that it demonstrates in a striking manner the slow acquirement of s.p.a.ce-perception by the eye, and also the acquirement of the first and second dimensions of s.p.a.ce (cf. vol. i, p.

57).

II., III. THE WARE CASES.

One of these cases is that of a boy, who at the age of seven years recovered his sight which he had lost in the first half-year of his life. The surgeon who performed the operation, James Ware, writes ("Philosophical Transactions of the Royal Society for 1801," ii, London, 1801, pp. 382-396):

"The young W. appeared to be a healthy, perfect child; his eyes in particular were large and rather prominent. About the end of his first year, a number of persons pa.s.sing in procession near his father's house, accompanied with music and flags, the child was taken to see them; but, instead of looking at the procession, it was observed that, though he was evidently much pleased with the music, his eyes were never directed to the place from whence the sound came. His mother, alarmed by this discovery, held silver spoons and other glaring objects before him at different distances, and she was soon convinced that he was unable to perceive any of them. A surgeon was consulted, who, on examining the eyes, p.r.o.nounced that there was a complete cataract in each. All thoughts of a.s.sisting his sight were (for the present) relinquished. As soon as he could speak it was observed that when an object was held close to his eyes he was able to distinguish its color if strongly marked, but on no occasion did he ever notice its outline or figure. I performed the operation on the left eye on the 29th of December, 1800. The eye was immediately bound up, and no inquiries made on that day with regard to his sight. On the 30th I found that he had experienced a slight sickness on the preceding evening. On the 31st, as soon as I entered his chamber, the mother with much joy informed me that her child could see. About an hour before my visit he was standing near the fire, with a handkerchief tied loosely over his eyes, when he told her that under the handkerchief, which had slipped upward, he could distinguish the table by the side of which she was sitting. It was about a yard and a half from him, and he observed that it was covered with a green cloth (which was really the case), and that it was a little farther off than he was able to reach.... Desirous to ascertain whether he was able to distinguish objects, I held a letter before him at the distance of about twelve inches, when he told me, after a short hesitation, that it was a piece of paper; that it was square, which he knew by its corners; and that it was longer in one direction than it was in the other. On being desired to point to the corners, he did it with great precision and readily carried his finger in the line of its longest diameter. I then showed him a small oblong bandbox covered with red leather, which he said was red and square, and pointed at once to its four corners. After this I placed before him an oval silver box, which he said had a shining appearance, and presently afterward that it was round, because it had not corners. A white stone mug he first called a white basin, but soon after, recollecting himself, said it was a mug because it had a handle. I held the objects at different distances from his eye and inquired very particularly if he was sensible of any difference in their situation, which he always said he was, informing me on every change whether they were brought nearer to or carried farther from him. I again inquired, both of his mother and himself, whether he had ever before this time distinguished by sight any sort of object, and I was a.s.sured by both that he never had on any occasion, and that when he wished to discover colors, which he could only do when they were very strong, he had always been obliged to hold the colored object close to his eye and a little on one side to avoid the projection of the nose. No further experiments were made on that day. On the 1st of January I found that he felt no uneasiness on the approach of light. I showed him a table-knife, which at first he called a spoon, but soon rectified the mistake, giving it the right name and distinguishing the blade from the handle by pointing to each as he was desired. He called a yellow pocket-book by its name, taking notice of the silver lock in the cover. I held my hand before him, which he knew, but could not at first tell the number of my fingers nor distinguish one of them from another. I then held up his own hand and desired him to remark the difference between his thumb and his fingers, after which he readily pointed out the distinctions in mine also. Dark-colored and smooth objects were more agreeable to him than those which were bright and rough. On the 3d of January he saw from the drawing-room window a dancing bear in the street and distinguished a number of boys that were standing round him, noticing particularly a bundle of clothes which one of them had on his head. On the same evening I placed him before a looking-gla.s.s and held up his hand. After a little time he smiled and said he saw the shadow of his hand as well as that of his head. He could not then distinguish his features; but on the following day, his mother having again placed him before the gla.s.s, he pointed to his eyes, nose, and mouth. The young W., a remarkably intelligent boy (of seven years), gave the most direct and satisfactory answers to every question that was put to him, and, though not born blind, certainly had not any recollection of having ever seen. The right eye was operated upon a month after the left, but without the least success."

In regard to the other case, Ware writes: "In the instance of a young gentleman from Ireland, fourteen years old, from each of whose eyes I extracted a cataract in the year 1794, and who, before the operation, a.s.sured me, as did his friends, that he had never seen the figure of any object, I was astonished by the facility with which, on the first experiment, he took hold of my hand at different distances, mentioning whether it was brought nearer to or carried farther from him, and conveying his hand to mine in a circular direction, that we [Ware and another physician] might be the better satisfied of the accuracy with which he did it." In this case, as in others of like nature, Ware could not, "although the patients had certainly been blind from early infancy," satisfy himself "that they had not, before this period, enjoyed a sufficient degree of sight to impress the image of visible objects on their minds, and to give them ideas which could not afterward be entirely obliterated."

Ware found, moreover, that, in the case of two children between seven and eight years of age, both blind from birth, and on whom no operation had been performed, the knowledge of colors, limited as it was, was sufficient to enable them to tell whether colored objects were brought nearer to or carried farther from them; for instance, whether they were at the distance of two inches or four inches from their eyes; and he himself observes that they were not, in strictness of speech, blind, though they were deprived of all useful sight.

Remarks on the Second and Third Cases.

It is a surprising thing, in the account of the former case, that nothing whatever is said of the behavior of the patient on the first and on the fourth day after the operation. We must a.s.sume that he pa.s.sed the first day wholly with his eyes bandaged. Further, the boy pointed out four corners of a box, while the box had eight; yet no inference can be drawn from this, for possibly only one side of the box was shown to him.

The most remarkable thing is the statement of the patient that he saw the _shadow_ of his hand in the gla.s.s. This circ.u.mstance, and the astonishing certainty, at the very first attempts to estimate s.p.a.ce-relations, in the discrimination of round and angular, and in the observation that the table was somewhat farther from him than he could reach, show what influence the mere ability to perceive colors has upon vision in s.p.a.ce. Before the operation, W. distinguished only striking colors from one another; but he could perceive nearness and distance of colored objects, within narrow limits, by the great differences in the luminous intensity of the colors. He distinguished with certainty dimness from brightness. Accordingly, when he noticed a decrease in the brightness of a color, he inferred the distance of the colored object from the eye, regulating his judgment also by touch. Thus the boy had, before the operation, some perception of s.p.a.ce with the eye, and it is not much to be wondered at, considering his uncommon intelligence, that he, soon after the operation (probably attempts at seeing were secretly made by the patient on the first day) learned to judge pretty surely of s.p.a.ce-relations--much more surely than a person born blind learns to judge in so short a time. Besides, it is not to be forgotten that, while it is true that the cataract had become completely developed at the end of the first year of life, there is no proof that the child was unable to see during the first months. At that time images, as in the second case, may have unconsciously impressed themselves, with which, at a later period, more accurate s.p.a.ce-ideas may have been a.s.sociated, through the sense of touch, than is the case with persons born completely blind. Ware concludes, from his observations--

1. "When children are born blind, in consequence of having cataracts in their eyes, they are never so totally deprived of sight as not to be able to distinguish colors; and, though they can not see the figure of an object, nor even its color, unless it be placed within a very short distance, they nevertheless can tell whether, when within this distance, it be brought nearer to or carried farther from them.

2. "In consequence of this power, whilst in a state of comparative blindness, children who have their cataracts removed are enabled immediately on the acquisition of sight to form some judgment of the distance, and even of the outline, of those strongly defined objects with the color of which they were previously acquainted."

Both these conclusions are simply matter of fact. It only needs explanation how the distance and outlines of objects can be known after the operation _in consequence of_ the ability described in the first proposition. That distance is actually estimated at once in consequence of this power, is clear; not so with the outlines. How can round and angular be distinguished, when only colors and gross differences of intensity and saturation are perceived? Ware gives no solution of the difficulty, but thinks that, because the colors appeared more intense, the previously imperfect ideas concerning distances might be improved and extended, so that they would even give a knowledge of the boundary-lines and of the form of those things with the color of which the patients were previously acquainted. But this improvement of the ideas concerning distance can not lead directly to discrimination of the limits of objects, and is itself hypothetical, inasmuch as we might expect, _immediately_ after the operation, on account of the enormous difference in the luminous intensity, an uncertainty in the judgment.

But such uncertainty appeared only in a slight degree in both the cases, a thing possible only because there had already been sufficient experiences with the eye. But these experiences, as is frequently stated, were absolutely lacking in regard to the limits and the form of objects. Here another thing comes in to help. Evidently, an eye that distinguishes only colors sees these colors always only as limited; even if it saw only a single color that occupied the whole field of vision, the field would still be a limited one. But the colored field may be small or large, and this difference may be noticed before the operation.

If the object--one of vivid coloring--is long and narrow, the patient, even before the operation, will see it otherwise than if it is, with the same coloring, short and broad. And suppose he merely observes that not the whole field of vision is colored. If the whole field is colored, there is, of course, an entire lack of angles; on the other hand, if the whole field of vision is not filled by the colored object, then it is--however faintly--divided, and the lines of division, i. e., the indistinct boundary-lines of the objects whose color is perceived, may be either like the natural limits of the entire field of vision, i. e., "round," or unlike them, i. e., "angular." If, now, the obstacle is suddenly removed, the patient (even if he did not before the operation distinguish angular and round by the eye) must yet perceive which of the objects before him resemble in contour the previous field of vision, i. e., are round, and which do not; for the round contour of his field of vision is familiar to him. But W. had learned, through the sense of touch, that what is not round is angular. He would, therefore, even if he could perceive colors when the whole field of vision was filled--a matter on which we have no information--be able to guess the outlines of some objects soon after the operation, merely on the ground of his experiences before it. It was guess-work every time, as appears from the confounding of knife and spoon, mug and basin. The boy must have thought, "How would it be if I felt of it?" and, as he had before the operation frequently observed that whatever had the same contour as his field of vision, or a contour similar to that, was round, he could, after the operation, distinguish round and not round--a thing which a person born blind, on the other hand, and knowing nothing of his field of vision, because he has never had any, can never do.

On the whole, the two Ware cases are by no means so important as the Franz (see below) and Chesselden cases, because the boy, W., had ample opportunity up to his seventh year for learning to distinguish different colors according to their quality and luminous intensity; because he must have known the limits of his field of vision, and could in any case, by means of touch, correct and relatively confirm his very frequent attempts to guess at forms and distances by the eye. Finally, it is not known whether he became blind before or immediately after his birth, or, as is most probable, not till some months after birth. The same is true of the second case.

IV, V. THE HOME CASES.

Everard Home makes the following statement in the "Philosophical Transactions of the Royal Society," London, 1807, i, pp. 83-87, 91:

"1. William Stiff, twelve years of age, had cataracts in his eyes, which, according to the account of his mother, existed at the time of birth. From earliest infancy he never stretched out his hand to catch at anything, nor were his eyes directed to objects placed before him, but rolled about in a very unusual manner. The eyes were not examined till he was six months old, and at that time the cataracts were as distinct as when he was received into the hospital. He could at that time (July 17, 1806) distinguish light from darkness, and the light of the sun from that of a fire or candle; he said it was redder and more pleasant to look at, but lightning made a still stronger impression on his eyes. All these different lights he called red. The sun appeared to him the size of his hat. The candle-flame was larger than his finger and smaller than his arm. When he looked at the sun, he said it appeared to touch his eye. When a lighted candle was placed before him, both his eyes were directed toward it, and moved together. When it was at any nearer distance than twelve inches, he said it touched his eyes.

When moved farther off he said it did not touch them, and at twenty-two inches it became invisible.

"On the 21st of July the operation of extracting the crystalline lens was performed on the left eye. Light became very distressing to his eye. After allowing the eyelids to remain closed for a few minutes, and then opening them, the pupil appeared clear, but he could not bear exposure to light. On my asking him what he had seen, he said, 'Your head, which seemed to touch my eye,' but he could not tell its shape. On the 22d the light was less offensive. He said he saw my head, which touched his eye. On the 23d the eye was less inflamed, and he could bear a weak light. He said he could see several gentlemen round him, but could not describe their figure. My face, while I was looking at his eye, he said was round and red. From the 25th of July to the 1st of August there was inflammation. On the 4th of August an attempt was made to ascertain the powers of vision; it became necessary to shade the glare of light by hanging a white cloth before the window. The least exertion fatigued the eye, and the cicatrix on the cornea, to which the iris had become attached, drew it down so as considerably to diminish the pupil. The attempt had therefore to be postponed.

"On the 16th of September the right eye was couched. The light was so distressing to his eye that the lids were closed as soon as it was over. The eyes were not examined with respect to their vision till the 13th of October; the boy remained quiet in the hospital. On this day he could discern a white, red, or yellow color, particularly when bright and shining. The sun and other objects did not now seem to touch his eyes as before, they appeared to be at a short distance from him. The right eye had the most distinct vision, but in both it was imperfect. The distance at which he saw best was five inches. When the object was of a bright color, and illuminated by a strong light, he could make out that it was flat and broad; and when one corner of a square substance was pointed out to him, he saw it, and could find out the other, which was at the end of the same side, but could not do this under less favorable circ.u.mstances. When the four corners of a white card were pointed out, and he had examined them, he seemed to know them; but when the opposite surface of the same card, which was yellow, was placed before him, he could not tell whether it had corners or not, so that he had not acquired any correct knowledge of them, since he could not apply it to the next colored surface, whose form was exactly the same with that, the outline of which the eye had just been taught to trace....

"2. John Salter, seven years of age, was admitted into St.

George's Hospital on the 1st of October, 1806, with cataracts in both eyes, which, according to the accounts of his relations, had existed from his birth. The pupils contracted considerably when a lighted candle was placed before him, and dilated as soon as it was withdrawn. He was capable of distinguishing colors with tolerable accuracy, particularly the more bright and vivid ones. On the 6th of October the left eye was couched. The eye was allowed ten minutes to recover itself; a round piece of card, of a yellow color, one inch in diameter, was then placed about six inches from it. He said immediately that it was yellow, and, on being asked its shape, said, 'Let me touch it, and I will tell you.' Being told that he must not touch it, after looking for some time, he said it was round. A square, blue card, nearly the same size, being put before him, he said it was blue and round. A triangular piece he also called round.

The different colors of the objects placed before him he instantly decided on with great correctness, but had no idea of their form. He saw best at a distance of six or seven inches. He was asked whether the object seemed to touch his eye; he said, 'No,' but when desired to say at what distance it was, he could not tell. The eye was covered, and he was put to bed and told to keep himself quiet; but upon the house-surgeon going to him half an hour afterward, his eye was found uncovered, and he was looking at his bed-curtains, which were close drawn. The bandage was replaced, but so delighted was the boy with seeing, that he again immediately removed it. The house-surgeon could not enforce his instructions, and repeated the experiment about two hours after the operation. Upon being shown a square, and asked if he could find any corners to it, the boy was very desirous of touching it. This being refused, he examined it for some time, and said at last that he had found a corner, and then readily counted the four corners of the square; and afterward, when a triangle was shown him, he counted the corners in the same way; but in doing so his eye went along the edge from corner to corner, naming them as he went along. Next day he told me he had seen 'the soldiers with their fifes and pretty things.' The guards in the morning had marched past the hospital with their band; on hearing the music, he had got out of bed and gone to the window to look at them. Seeing the bright barrels of muskets, he must in his mind have connected them with the sounds which he heard, and mistaken them for musical instruments.

Twenty-four hours after the operation the pupil of the eye was clear. A pair of scissors was shown him, and he said it was a knife. On being told he was wrong, he could not make them out; but the moment he touched them he said they were scissors, and seemed delighted with the discovery.

"From this time he was constantly improving himself by looking at, and examining with his hands, everything within his reach, but he frequently forgot what he had learned. On the 10th I saw him again. He went to the window and called out, 'What is that moving?' I asked him what he thought it was. He said: 'A dog drawing a wheelbarrow. There is one, two, three dogs drawing another. How very pretty!' These proved to be carts and horses on the road, which he saw from a two-pair-of-stairs window.

"On the 19th the different colored pieces of card were separately placed before his eye, and so little had he gained in thirteen days that he could not, without counting their corners one by one, tell their shape. This he did with great facility, running his eye quickly along the outline, so that it was evident he was still learning, just as a child learns to read.

He had got so far as to know the angles, when they were placed before him, and to count the number belonging to any one object.

The reason of his making so slow a progress was, that these figures had never been subjected to examination by touch, and were unlike anything he had been accustomed to see. He had got so much the habit of a.s.sisting his eyes with his hands, that nothing but holding them could keep them from the object.

"On the 26th the experiments were again repeated on the couched eye. It was now found that the boy, on looking at any one of the cards in a good light, could tell the form nearly as readily as the color."

From these two instructive cases Home concludes: