mi: ILLTSTH AT Kl) HEW Blind Man Who is Famous as a Mathematician "Blue Ribbon" Beer Novi'inbr 2, 1002. Copyright 1W2, by Henry Allston.) TONR HUM) from his birth, tun notwithstanding this groat hand icap, a world-rccognizcd nutht-r-Ity on tho so-cnlli'd hiiih'-r mathematics, Lewis H. Carll i f Prooklyn, is shortly to Issuo in book form tho risult of twenty years of research over tho most abstruse mathematical problems ever roneeive-l by tlie mitnl of man. This book will look like so mueh dn-ek ' or Sanskrit even to the man wivi prides limself on his knowledge of algebra mni geometry. When It Is Riven to the math ematical world it will In- found that, for the first time, many of the problems that have defied solution since the days of th ancient calculator who phouted "Kuroka" n a certain memorable cecasicii have been interpreted logically ami corn el ly by a man whoso pupils include well known o 1 lego mat noma: leal professors and wh has 1m en consulted by tii li m i it'll t nil In Ti tles as l'rof. Simon Newcimb. This will be Mr. ('Mill's second book Mis first was Issued in 11, after ten yeaiv of study and research. It has ."f.S pages ami is called the "Cal.ulus of Variations.' It Is the only book of its kind extant and has hein out of print pome years, fur llier are not many mathematically Inclined per sons who care to wrestle with the varia tions, to say nothing of differential and In tegral cab uiiH. before which the average mind quails. The demand for the sec ond bo.ik will bo even smaller, by reason of the fact that it will deal exclu sively with several Isolated points that Mr. ("aril was unable to make clear in his first work. "Hut now," ho said the other day as ho sat In tho library of hi Ilrooklyn homo, "now, after twenty years of hard and continual work on those most difficult of all problems, I have solved them at last. And just think, please, that In return for all these years of patient and delicate research I shall not receive a cent. My first book netted me $2 .10. Two hundred and fifty dollars for ten years' labor, not a cent for twice ten years' toil! I!ut the fame ah!" It was his desire for a reputation, limited though it might be to a small circle, that led Mr. Carll to take up a lino of work that hundreds of eminent mathematicians from Kuelid down either have seduoiisly avoided or given up in despair as being unsolvable by them. m When Mr. Carll graduated from Columbia university. In 1 STe), pressing Seth Low, now mayor of New York, hard for first honors, he wanted to become a teacher of the classics. To that end ho had worked with Infiinite patience in an institution for the blind and all through his college course. He first had to have someone read Greek and Iatin to him, then he had to transcribe the pavsagrs by means of tho point system of writing for tho blind, then he had to learn his lessens like any other student. M. Carll's lessons were read to him by a classmate, who was sent through college by Mr. Carll's father in order that he might be eyes to his son. Most of the reading was done on the train while tho two stu dents traveled between tho college and Mr. Card's father's farm at WhitcKtone, Long Island, tho blind student's companion being the son of a neighboring farmer. Then in the evening Mr. Carll would study over tho lessons that he had taken down in the point system of writing. On Saturdays his com panion would read to him for six or eight hours, and in this way Mr. Carll managed to keep ahead of his class and do the stipu lated amount of outside work. After he had done all this and thoroughly equipped himself as a elassical scholar he could secure no pupils who were looking forward to the degree of n. A. Instead, all who camo to him at his father's home wanted instruction In mathematics. "Naturally," said Mr. Carll the other day, "I was sorely disappointed, but I wanted to be independent, so I taught mathematics, In which I had never prided or distinguished myself. As time went on more pupils came to me; I became more Interested In mathe matics; I studied Its branches as earnestly and enthusiastically as I had my Latin and Greek, which now were deserted. Pret0 soon, after I had mastered differential and Integral calculus, I found that nobody knew very much about calculus of variations, ex cept that there was such a branch. Then I said to myself, 'Why don't you find out something about It, and perhaps, if you do. you'll gain some fame.' So. when I could find time between students, I struggled in the new field. Now I am known to all mathematicians by my works, but the gen eral public hasn't heard much about me, and I never expected It would. Still, I fool that I have done what I set out to do anl I am satisfied." "How have I worked? How have I done It?" A pmlle played on the speaker's gen tle face. "Ah, It Is a long story, but If you want to know, I'll tell you. "Well, when I began to look up the sub ject of calculus of variations I found, to my amazement, that only one book on the subject ever had been published In the Eng lish language. It had appeared In lS.'l, and was from the pen of Prof. John II. Jellet of the t'nlverslty of Dublin. Put, try as hard as I could In this country and Europe, I could not secure a copy of It. The book seemed to have disappeared. "There was nothing left for rne to do ex cept to gather my necessary working mate rial from all sorts of sources here and abroad, so I set to work In earnest. New York's libraries possessed at that time , .. ;: "v t- ?;: y TT -?'- ' " 11 w -j JSil I ULJU1I1JLLJ 1 I IIIIIWI fl"" LEWIS H. CARLL WORKING OI THE AID OF A SLATE FOR scarcely any of the books that I needed In my researches. Therefore I was compelled to send out postal cards to the libraries at Yale and Harvard and In Europe, asking If they hail certain mathematical books and Journals. When they replied in the affirma tive I then asked for the loan of the books and papers, the officials of Columbia uni versity guaranteeing the libraries that I would take good care of their precious and rare documents. In this way I secured my necessary working data. This took, all told, about throe years. "Put after I had the books, how could I make use of them, you will ask. Well, my brothers, and one In particular, Addison, .were very good to mo. I trained them how to read mathematics and once every two or three days I'd get one of them to read for about five minutes to mo. If tho book win ill a foreign tongue, as often it was, I had first to translate It. Then I'd tell him to stop, after which I'd lock myself In my room and while pacing up and down tho floor think it over, arrange and rearrange hundreds of times, and apply to the prob lems I had in mind tho matter that had been read to me. Sometimes it would take me a week to secure a complete under standing of tho few lines that I had listened to. After I had grasped It all I would have Addison read another short passage and once more I'd lock myself up and think. In this way I worked out my first book and my second, except that In tho case of the latter I did not have to look up ma terial, for I had all that I needed In my first work." Mr. Carll paused and pointed to his sight less eyes. "Of course, they kept me from using pen and paper in my tasks," ho said, "so I have had to carry every Intri cate problem and there are hundreds of them In my mind. One problem I turned over in my head for three years before I wrote it down In the point system. It covers pages upon pages In my first book, but as I solved It step by stop my memory stored it away to bring it forth In all Its completeness when at last I had the answer and was ready to write It all down. And I believe that, if all tho copies of my book and the plates and tho manuscript were to be destroyed. I could produce thi book again by calling my memory Into service. Once these problems get Into my head they seem to stay there In all their minute details. "In such manner I produced the copy for both my books. As the point system of writing Is based on punctures in paper made by a stylus and are similar to holes made by a pin point in paper, you can readily see how long I was about the task, especially when you bear In mind that I had to create in this writing all the many different characters usi d in the "Var'a t ions." "Of course, after I had written down the problems some one had to transcribe them in ordinary writing. My brother Ad dison wrote the first book for me; my wife has Just finished this task with tho second. When the proofs of my first book came Addison read them to me and made the corrections that I ordered. Only a half dozen mistakes have been found In tho book In all these years and these are mis spelled words. "In addition to my memory I have had recourse to the slate for the blind. "This slate Is a square board cut Lp T PROPLEMS IN CALCULI'S WITH THE BLIND. into little sunken squares and into which are placed type-like affairs that represent certain figures. For instance, tho numerals are made nlmi si wholly by the use of tho letters T and V. In its proper position, T repreesnts the numeral 1. Turned on Its side and with the crossllne to the left If is 2. With the crrssline down It is 3, and with the crossllne to tho right it Is 4. V in Its natural position Is .1. with tho opening to the left it Is fi. With the opening down, 7, and with the opening to the right, S. L represents 3 and a blank type 0. There are also characters for simple algebra, but none higher. Therefore, I have had to do- velop a system of my own, using the regu- lar and few types employed by the blind, for I could get no one to cast mo tho various queer characters that I needed. This system Is often complex, owing to the fact that I have had to employ all ho myriad characters known to algebra, geometry, trigonometry and calculus, which last branch Includes Greek alphabetical characters. Here again In my work memory plays a largo part, for It would never do to forget the scores of names I have given the ordinary types and tho uses to which I have put them. "This Is an example of how I use my slate: I take a common algebraic char acter and by turning It, as T and V are turned to secure the numerals, I obtain f 1 v TTr i " y ; EQUIPPED WITH Moffett Roller Bearing Axles. BUILT BY P. J. KARBACH & SONS, Carriage and Wagon Makers. 13th and Howard Streets, Omaha. the eight trlgonomerlcal functions, sine, co-sine, versed-sine, co-verse. tangent, co-tangent, secant and co-secniit. "It Is only on rare occasions however, that I use the slate. 1 much prefer to solve problems while paring my room, and 1 have to sit down when 1 work with the late." Here Mr. Carll raised a warning hand "Put don't eny me my memer;, he said, laughingly. "I fear that, for iiMn ordi nary uses it Isn't much ned. Why, On you know that It's a fact that I cannot do simple problems in addition. Mibl tac tion, multiplication and division in my bead? When 1 want to figure up my liv ing expeiisi s, fur Instance, 1 am compelled to seek aid of my Mate. Strange, Isn't It? "Neither am I a lightning calculator, as you might be led to think from my tnathe tnacal reputation. 1 work with pains taking slowness from sheer inability to grasp things mathematical quickly. 1 do believe that my brain, when it is wrestling with figures, moves as slowly as that of n boy Just beginning to learn the significance of the multiplication tables." Mr. Carll Is going to call bis new bonk "Afterthoughts on Calculus of Variations." These "Afterthoughts" ileal with the tum-t formidable problems ku.iwn In mathematics, which also have a formidable sounding name - isopeiiinet l ie al problems. Robin ii of technical language, they are probloin.- tbat have to do with equal perimeters, but what they have to do with equal perimeters deponent knoweth not, though bo listened attentively to a detailed and simplified explanation by Mr. Carll. Although Mr. Carll gained Immediate fame after his first book appeared, be Is known personally to very few of the mathe maticians. The absence of sight has kepi him from attending the gatherings of Un learned men of figures, but it has not pre vented him from Instructing eminent schol ars by mail. l'rof. Simon Newcomb, the famous scientist and astronomer. Is repre sentative of the men who have sal at Mr. Carll's feel. Mr. Carll Is a fellow at Columbia uni versify. His friend. Mayor Low, with whom, during college days, he was wont to sojourn at Fritz's, a one-time famous resort for Columbia students, secured Mr. Carll tho fellowship In recognition of hie work. Every year be delivers a course- of lectures at tho university to tho mathe matical professors, among whom are such leaders In the educational world as Dr. Thomas Flsk and Prof. J. H. Van Amrlnge, head of the mathematical department. The late Prof. William C. Peck of Columbia, who made a big name in the college world by compiling that stupendous mathematical work, "Davies' Legendre," often consulted Mr I j ' ' ' Carll. You ought by all means to drink a malt whiskey and ILER'S PURE HALT It conceded to be the purest and best mult whiskey in addition to being iy ar iuc uuesi lu flavor. WILLOW SPRINGS niSTlLLcKI, Omaha, Neb.,U.S.A. SALES HAVE 1 i llltl.EI IS I SE I IN Mt HIE IlKMES THAN IT ANY O i l I Kit WHY' Hl.rn UimtnN Is bealtbful It li p I fcotly iimt fully fermented. It is not a young beet- It will not cause iloiis'ies It Is stored for mouths In-fore we market It. Every bottle Is sterilized after being scaled. 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