CASH ACCOUNT. APRIL. ^ >L 



I I Received. | Paid. 



I 'ffe' was torn la Boston in 184S, tlia 

 son of John Hows TroVbrld^e and 

 Adsllna Trowbridge. He received the 

 degrree of S. B. fronj the Lawrence 

 Bolentlflo BOhool In 186! and that of 

 6. D. in 1873. From 1866 to 1869 he , 

 was assistant In mathematics at Har- 

 vard and for the following year was 

 pi-ofessor of physios at M. I. T. 



WROTE MANY VOLUMES 

 He then received an appointment to 

 that department at Harvard, whlob 

 then occupied only two small rooms. 

 Realizing the need of larjfer quarters, 

 he raised among' his friends almost the 

 entire cost of erection of the JefTorson 

 physical laboratory. He was a director 

 of the laboratory for many years. He 

 resigned from active participation In 

 the physios department In 1910. 



Hb Tvas a member of the National 

 Academy of Arts and Soleuoes. the 

 American Academy of Arts and 

 Sciences and the American iPhllosoph- 

 Ical Socieiy. He was the author of 

 many volumes and papers on physloal 

 subjects, particularly In the electrical 

 field. He was a delegate to several 

 national nnd International congresses 

 of electrical engineers, 

 ^of- Trowbridge married, In 1S75, 

 Mary Louise Thayer, who died In 1907 

 Ho Is survived by an adopted daugh- 

 ter, Mrs. (Edmund M. Parker of Cam- 

 l)rldge, and a slst«r, Mrs. E. Sumner 

 Mansflold. 



