160 ROYAL SO I ET Y OF CANA PA 



This volume. Prof. Ilartt has told us, is a report of liis o^vn inves- 

 tigations, and incorporates the best results of others who have written 

 on the geology and physical geography of Brazil. The volume, which 

 was published in ISTO, is illustrated by sketches and a map drawn by 

 the author himself. That Ilartt was not satisfied with the data that 

 he had accumulated for this great work is shown by the fact of his 

 desire to return to Brazil and add more to his own and to the world's 

 knowledj^e of that vast empire. By the generosity of friends, especially 

 Mr. E. B. Morgan, of Aurora, N.Y., Hartt was enabled to conduct two 

 additional expeditions to Brazil. They are known as the ^lorgan 

 expeditions. The first of these was undertaken in 1870, and Ilartt was 

 accompanied by Mr. A. N. Prentiss, professor of botany in Cornell, and 

 eleven students of that institution. Xo better testimony than this can 

 be given of the enthusiasm which Hartt had aroused, nor of his own self- 

 sacrifice in assuming the responisibility and training of so large a number 

 of students in so distant a field. " If," he wrote, " to discover a new car- 

 boniferous fauna will repay a journey to Brazil, of how much greater 

 importance is the discovery of a new naturalist ? Had the expedition 

 no other results than to add four new men to science, I should have 

 considered time and money amply well spent." 



It was on his return from the first Morgan expedition, his third 

 journey to Brazil, that he published his dissent from Professor Agassiz 

 on the marks of glacial action found in the valley of the Amazon. The 

 researches of geologists since have fully confirmed Plartt's view. 



In 1871 Hartt again returned to Brazil on what is known as the 

 second ^lorgan expedition, accompanied by one assistant, Mr. 0. A. 

 Derby. On his return to Cornell in 1872, he devoted himself for two 

 and a half years to his duties at the university, devoting all his spare 

 time, with the aid of his two assistants,, Messrs. Derby and Rathbun, to 

 working up' the results of the two Morgan expeditions, publishing some 

 of these results in the journals of several scientific societies^ and direct- 

 ing popular attention to Brazil in a series of lectures given at Xew 

 York, Boston and Syracuse. 



But the important work he had undertaken, and the, to him, meagre 

 results that had been accomplished, led him to conceive of no less a 

 project than a survey of the vast empire of Brazil. The details of this 

 work are too well known to need recapitulation here. It is suilicient to 

 say that a geological commission for the survey of the empire of 

 Brazil, with Hartt as its chief, was established under the authority and 



' Cliielly the Bulletin of tlie BufTalo Society of N;Uunil .Scii-nce, and the Cornell 

 UnlverBity Rullf-tir. 



