126 Canadian Record of Science. 



Prof. Hartt's scientific career may be said to have cover- 

 ed a decade and a half, and one can only wonder at the mar- 

 vellous industry which crowded what might well he con- 

 sidered the work of an ordinary life-time into this short 

 period. Only those engaged in his enterprises knew the 

 variety and excellence of his scientific work, or could appre- 

 ciate the skill with which he directed the operations first 

 of his exploring parties in Brazil, and then of the Geological 

 Survey of that vast region. Judging from his brilliant be- 

 ginning, we may confidently assert that, had he not been 

 cut off in his prime, he would have accomplished a work 

 that would have placed him beside the greatest of the geo- 

 logical investigators of the present century. 



.None but the hardiest constitution could stand the great 

 strain which Hartt laid on his physical powers, and under 

 the exhausting heat of a tropical climate he finally suc- 

 cumbed. Having been on an exploring expedition inland, 

 he came out upon the coast at Bio de Janeiro tired and 

 worn out by physical toil and mental anxiety ; the latter 

 due to the difficulties in which the Survey had been placed 

 by changes in the administration of the country. Here he 

 was attacked by that formidable scourge of the lowlands of 

 tropical America — yellow fever. His exhausted system 

 could not withstand the disease. His illness was of scarcely 

 more than two days duration, and he suddenly (and unex- 

 pectedly to those who were watching him) passed away in 

 the early morning of Monday 18th of March 1878. 



Prof. Hartt was a man of winning manners, affectionate 

 disposition and generous nature, and was greatly esteemed 

 by his scientific associates. He was gifted with an original 

 and inventive mind, and indefatigable industry. The Christ- 

 tian training of his early home, and the stimulating influen- 

 ces of the educational institutions where he spent the first 

 years of his life, no doubt served largely to form his charac- 

 ter. His death terminated the Geological Survey of Brazil, 

 as no one was thought worthy of taking the mantle which 

 fell from him. His assistants remained to work up the 

 material which he had gathered; but the leading mind 



