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grew up a warm mutual personal regard and friendship ; in the 

 Tremont Medical School in Boston, which has given to the pro- 

 fession so many zealous and productive laborers in medical sci- 

 ence ; and in the Massachusetts General Hospital. He was ar- 

 dent and industrious as a medical student, but never allowed his 

 attention to be withdrawn from the study of nature, the micro- 

 scope becoming his constant companion, and a source of never- 

 failing pleasure. As evidence of his ability, it may be stated that 

 in two successive years he gained the annual prize offered by 

 the Boylston Medical Society. The subject of the first essay 

 was Cancer^ which he treated with especial reference to its mi- 

 croscopic structure ; and of the second. The Sexual System, or the 

 production of being, considered as to its physiology and philosophy. 



In 1849, at the age of 21, he graduated in medicine, and soon 

 after visited Europe, where his attention, especially at Paris, was 

 given almost exclusively to natural history and microscopic ob- 

 servation. The expectations of intellectual progress which he 

 now looked forward to with so much interest, were soon doomed 

 to severe disappointment. It was in Paris that he received the 

 first serious warning that consumption, the disease which event- 

 ually destroyed his life, had already marked him for its early 

 victim. After an absence of only four months, he reembarked 

 for America, to receive the benefit of a more genial climate in 

 one of the southern States, and each successive winter he passed 

 either in Carolina, Georgia, or Florida, in order to avoid the 

 inclement and uncongenial climate of New England. He had 

 now no permanent location, was constantly shifting from place 

 to place, to mitigate, as far as possible, the steady progress 

 of his disease. Every thing seemed adverse to any thing like 

 connected study. Nevertheless, it was during these few unsettled 

 years that he accomplished an almost incredible amount of intel- 

 lectual labor. He was incessantly occupied with his microscope ; 

 his mind was ever on the alert, and he allowed scarce a day to 

 pass without some observation, without something added to his 

 stock of acquired knowledge. 



In the winter of 1851, he delivered at the Medical College in 

 Augusta, Ga., a successful course of lectures on Microscopic 

 Anatomy. In the summer of 1852 he prepared the principal 



