Ruschenberger.] XO*± [Nov. 6, 



his watch, money, &c, on the ground as he ran, and reached it 

 just in time to jump on board of a boat putting off to the rescue. 

 The boat had proceeded only a short distance when it was 

 swamped. Dr. Rogers seized an oar, swam to the drowning 

 persons, gave it to them and urged them to sustain themselves 

 till aid should arrive. The drifting boat was flung against one 

 of the gentlemen and the oar was wrenched from him. Seeing 

 this. Dr. Rogers placed himself in a manner under him, and thus 

 bearing him up, brought him, as well as those holding fast to 

 the oar, safely ashore. 



And this was the third time he had heroically saved persons 

 from drowning. 



He had a remarkable facility in the use of tools of all kinds, 

 and a respectable talent for mechanical contrivance. He was 

 author of many inventions — notable among them the Rogers and 

 Black steam boiler — and of several modifications and improve- 

 ments of electric apparatus. This ability was early manifested, 

 1835-36, in his original experiments on osmosis, in which he 

 demonstrated how changes in the blood are produced by respira- 

 tion. 



The tenderness of his nature may be discerned in the follow- 

 ing sentences from the postscript of a letter to his brother 

 William, May 6, 1833 : " My Dear Brother — What can be more 

 grateful to an affectionate heart than to find in others a sympathy 

 and reciprocation of the same warm feelings it proffers. How 

 doubly blessed do I consider myself when I feel that in my 

 brothers I have found such beings. 



" I had sealed this letter at home, but thinking it well before de- 

 livering it to the mail to inquire for letters, I have been rejoiced 

 to find yours of the 2d of May, and thus I am enabled to 

 acknowledge its receipt and, let me assure you, with a thousand 

 thanks for its contents." 



The Chairman of the Executive Committee, Dr. Samuel Ash- 

 hurst, of the Society of the Alumni of the Medical Department 

 of the University of Pennsylvania, in the annual report for 1885, 

 says : " Highly endowed with the qualities which make an 

 attractive lecturer, Dr. Rogers was always popular with the large 

 classes who for so many years obtained their elementary knowl- 

 edge of chemistry from his instruction, while his genial man- 

 ners and his amiability of heart made him beloved by very 



