11Q 



1885.] J.x*J [Ruschenberger. 



permanent Secretary, u to write the address for which I was pre- 

 paring early in the summer, I should have taken the risk of pre- 

 senting myself at Nashville, though only for a day or two. But 

 the nerve-exhaustion to which I have for many years been liable? 

 aggravated by the season, compelled me soon to suspend and 

 finally give up the work."* 



In 1875-6 he assisted in establishing at the University of 

 "Virginia, a Museum of Natural History, and in 1876-7 contrib- 

 uted a thousand dollars to the fund of the institution.f 



At the Commencement of the Massachusetts Institute of 

 Technology, May 30, 1882, while delivering an address, he bent 

 forward on the table before him as if to consult notes, then 

 slowly regaining an erect position, he threw up his hands. His 

 life had ended. The last sentence he uttered was, u I remember, 

 that one hundred and fifty years ago Stephen Hales published a 

 pamphlet on the subject of illuminating gas, in which he stated 

 that his researches had demonstrated that 128 grains of bitumi- 

 nous coal " i 



Thus was closed, probably without pain, his bright career. 

 He had fairly won and received all the compliments and honors 

 that a votary of science in this country can win ; and he was 

 universally esteemed in private life on account of his probity, 

 urbanity and social accomplishments. 



Henry Darwin Rogers, the third son and fourth child, was 

 born in Philadelphia, August 1, 18084 



The name Darwin was given to him by his father in token of 

 his admiration of the poetical works of Erasmus Darwin, par. 

 itcularly of his Botanic Garden, long passages from which he 

 was often pleased to repeat for the entertainment of the family. 



He was educated in Baltimore and Williamsburg, Va. 



In his twenty-second year, January, 1830, he was elected Pro- 

 fessor of Chemistry and Natural Philosophy in Dickinson Col- 

 lege, Carlisle, Pa. " Whilst connected with the College he 

 edited The Messenger of Useful Knowledge, a monthly maga- 

 zine of scientific character, and also containing essays on educa- 



*Proc. Amer. Assoc, for the Advanc. Sc, xxvi, p. 373. 1877. 

 tSee A Sketch of the University of Virginia. Richmond, Va., 18S5. 

 J His parents lived at No. 205 Mulberry, now Arch street, in 1807 and 1808; and 

 at No. 13 S. Ninth street, in 1810, 1811 and 1812— see City Directory. 



