THE PROGRESS OF SCIENCE 



207 



ClIAIiLES Abiathak White. 



chemist and a physicist, was born in 

 1835 and graduated from Yale in 1858 

 and later in medicine from the Albany 

 Medical School. He held various posi- 

 tions, including the chair of physiolog- 

 ical chemistry at Yale until 1873, when 

 he became professor of physics at the 

 University of Pennsylvania, and for 

 thirty-seven years, latterly as pro- 

 fessor emeritus, held a leading position 

 in the university, when Philadelphia 

 had a more dominant position in sci- 

 ence than it has been able to maintain. 



Professor Barker was an admirable 

 lecturer and the author of widely-used 

 text-books of chemistry and physics; 

 he served as expert in important legal 

 cases and carried forward research 

 work of consequence. He was elected 

 to the National Academy in 1876 and 

 was president of the American Asso- 

 ciation for the Advancement of Science 

 in 1879. 



General Comstock, born in 1831, 

 graduated from West Point in 1855 

 and taught physics in the academy. 



