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Probably the most remarkable of the blind scientists was the Englishman； Saunderson； who in 1683； in his first year； was deprived of sight after an attack of small…pox。 In spite of his complete blindness he assiduously studied the sciences； and graduated with honor at the University of Cambridge in mathematics and optics。 His sense of touch was remarkable。 He had a collection of old Roman medals； all of which； without mistake； he could distinguish by their impressions。 He also seemed to have the ability to judge distance； and was said to have known how far he had walked； and by the velocity he could even tell the distance traversed in a vehicle。 Among other blind mathematicians was the Dutchman； Borghes （died in 1652）； the French astronomer； the Count de Pagan； who died in 1655； Galileo； the astronomer； Cassini； and Berard； who became blind at twenty…three years； and was for a long time Professor of Mathematics at the College of Briancon。
In the seventeenth century the sculptor； Jean Gonnelli； born in Tuscany； became blind at twenty years； but in spite of his infirmity he afterward executed what were regarded as his masterpieces。 It is said that he modeled a portrait of Pope Urban VIII； using as a guide his hand； passed from time to time over the features。 Lomazzo； the Italian painter of the eighteenth century； is said to have continued his work after becoming blind。
Several men distinguished for their bravery and ability in the art of war have been blind。 Jean de Troczow； most commonly known by the name of Ziska； in 1420 lost his one remaining eye； and was afterward known as the 〃old blind dog；〃 but； nevertheless； led his troops to many victories。 Froissart beautifully describes the glorious death of the blind King of Bohemia at the battle of Crecy in 1346。 Louis III； King of Provence； Boleslas III； Duke of Bohemia； Magnus IV； King of Norway； and Bela II； King of Hungary； were blind。 Nathaniel Price； a librarian of Norwich in the last century； lost his sight in a voyage to America； which； however； did not interfere in any degree with his duties； for his books were in as good condition and their location as directly under his knowledge； during his blindness as they were in his earlier days。 At the present day in New York there is a blind billiard expert who occasionally gives exhibitions of his prowess。
Feats of Memory。From time to time there have been individuals； principally children； who gave wonderful exhibitions of memory； some for dates； others for names； and some for rapid mental calculation。 Before the Anthropological Society in 1880 Broca exhibited a lad of eleven； a Piedmontese； named Jacques Inaudi。 This boy； with a trick monkey； had been found earning his livelihood by begging and by solving mentally in a few minutes the most difficult problems in arithmetic。 A gentleman residing in Marseilles had seen him while soliciting alms perform most astonishing feats of memory； and brought him to Paris。 In the presence of the Society Broca gave him verbally a task in multiplication； composed of some trillions to be multiplied by billions。 In the presence of all the members he accomplished his task in less than ten minutes； and without the aid of pencil and paper； solving the whole problem mentally。 Although not looking intelligent； and not being able to read or write； he perhaps could surpass any one in the world in his particular feat。 It was stated that he proceeded from left to right in his calculations； instead of from right to left in the usual manner。 In his personal appearance the only thing indicative of his wonderful abilities was his high forehead。
An infant prodigy named Oscar Moore was exhibited to the physicians of Chicago at the Central Music Hall in 1888； and excited considerable comment at the time。 The child was born of mulatto parents at Waco； Texas； on August 19； 1885； and when only thirteen months old manifested remarkable mental ability and precocity。 S。 V。 Clevenger； a physician of Chicago； has described the child as follows：
〃Oscar was born blind and； as frequently occurs in such cases； the touch…sense compensatingly developed extraordinarily。 It was observed that after touching a person once or twice with his stubby baby fingers； he could thereafter unfailingly recognize and call by name the one whose hand he again felt。 The optic sense is the only one defective； for tests reveal that his hearing； taste； and smell are acute； and the tactile development surpasses in refinement。 But his memory is the most remarkable peculiarity； for when his sister conned her lessons at home； baby Oscar； less than two years old； would recite all he heard her read。 Unlike some idiot savants； in which category he is not to be included； who repeat parrot…like what they have once heard； baby Oscar seems to digest what he hears； and requires at least more than one repetition of what he is trying to remember； after which he possesses the information imparted and is able to yield it at once when questioned。 It is not necessary for him to commence at the beginning； as the possessors of some notable memories were compelled to do； but he skips about to any required part of his repertoire。
〃He sings a number of songs and counts in different languages； but it is not supposable that he understands every word he utters。 If； however； his understanding develops as it promises to do； he will become a decided polyglot。 He has mastered an appalling array of statistics； such as the areas in square miles of hundreds of countries； the population of the world's principal cities； the birthdays of all the Presidents； the names of all the cities of the United States of over 10；000 inhabitants； and a lot of mathematical data。 He is greatly attracted by music； and this leads to the expectation that when more mature he may rival Blind Tom。
〃In disposition he is very amiable； but rather grave beyond his years。 He shows great affection for his father； and is as playful and as happy as the ordinary child。 He sleeps soundly； has a good childish appetite； and appears to be in perfect health。 His motions are quick but not nervous； and are as well coordinated as in a child of ten。 In fact； he impresses one as having the intelligence of a much older child than three years （now five years）； but his height； dentition； and general appearance indicate the truthfulness of the age assigned。 An evidence of his symmetrical mental development appears in his extreme inquisitiveness。 He wants to understand the meaning of what he is taught； and some kind of an explanation must be given him for what he learns。 Were his memory alone abnormally great and other faculties defective； this would hardly be the case； but if so； it cannot at present be determined。
〃His complexion is yellow； with African features； flat nose； thick lips but not prognathous； superciliary ridges undeveloped； causing the forehead to protrude a little。 His head measures 19 inches in circumference； on a line with the upper ear…tips； the forehead being much narrower than the occipitoparietal portion； which is noticeably very wide。 The occiput protrudes backward； causing a forward sweep of the back of the neck。 From the nose…root to the nucha over the head he measures 13 1/2 inche