XXH' 



account). (16.) F. C. Bonders, Gedenkiv.lr ^i-halten in der 

 licben Jahressitzung der Budapester Kon. Gesellschaft der Aertze 

 am 14 Oct., 1889, von Dr. W. Goldzieher, 8vo, pp. 28. (17.) 

 Bericht iiber die Zwanzigste Ver8ammlung,der Ophlhalmologischeu 

 Gesellschaft, Heidelberg, 1889 ; redigirt durbh W. Hess nnd W. Ze- 

 bender, Rostock, 14 Dec., 1889. (18.) Mannen van Beteekenis in 

 onze Dagen, Redactie : Dr. E. D. Pijzel. <Prof. Donderp, door Dr. B. 

 J. Stokvis, Haarlem, 1889. (19 ) F. C. Dondet-s, von Horstmann, 

 'Deuts. Med. Wocheoschrift,' 1*89, No. 14. / (20.) F. C. Dondcrs, by 

 Wenckebach, in * Students Almanaeb ' of Utrecht,. Jan., 1890. (21.) 

 K*anciscus Cornelius Donders, by Henry .Williams, M.D., Prof, of 

 Ophthalmology in Harvard University, in Proc. 'Araer. Acad. Arts 

 and Sciences, vol. 24, pp. 465-470. (22.) Frnm-iscus Cornelis 

 bonders, in ' Onde.rzoekingen*gedaan in hot Physiologisch Labo- 

 ratorium der Utrechtsche Hoogeschool.' Uitgegeven door Th. W. 

 Kngelmaun en C. A. Pekelharing. Veerde Reeks, I. I., Utrecht, 

 C. H. 1 E.> Breijer, 1890 (a true and deeply interesting tribute to 

 Dondefs' work and character, by<his son-in-law, signed "E."). 



W. B. 

 Joldtrynds, Dorking, 24/7* MarcJi, 1891. 



JOHN CASIY was born at Kilkenny, co. Cork, in May, 1820, and 

 died 3rd. January,. 1891, in Dublin. .He was educated at first in a 

 small school in his native village, and afterwards in a larger school in 

 Mitchelstown. He became a teacher under the Board of National 

 Education in various schools, including Tipperary National School, 

 and ultimately Head Master of the Central Model Schools, Kilkenny. 

 He then began to devote himself to mathematics. Being asked to 

 solve " Poncelet's Theorem," he solved it geometrically, having, in 

 doing so, discovered for himself much of the science of modern 

 geometry. In connexion with this he began a lifelong correspond- 

 ence with Dr. Salmon and the late Professor Townsend, at w'iose 

 suggestion be entered Trinity College, Dublin, in 1858, and obtained 

 Sizarehip in 1859, and Scholarship in 1861, and his B.A. degree in 

 1862. 



From 1862 to 1873 be was Mathematical Master in Kingstown 

 School, which during that time obtained a reputation for training 

 successfully for the Indian Civil Service Examinations. From 1873 to 

 1881 he was Professor of Higher Mathematics and Mathematical 

 Physics in the Catholic University, and from 1881 until his death was 

 a Fellow of the Royal University, and Lecturer in Mathematics iu 

 University College, Stephen's Green. In 1866 he was elected a member 

 of the Royal Irish Academy, and a member of its Council in 1872, and 

 was a Vice- President thereof for five years. In 1869 the University of 

 DubUn conferred on him the degree of LL.D. Hon. Cuus. He was 



