ANNIVEESART ADDRESS. 27 



as diorite or greenstone, or felspathic elvans, or felstones in 

 company ivitli pyritous minerals, the conclusion is almost irresistible 

 that gold will be present also. 



Mr. Hartt refutes the generally received idea that the gold 

 mines of Brazil are exhausted. This is a great mistake. He 

 says : " There are still surface deposits of great extent which, 

 with modern appliances, could be successfully worked. The 

 underground wealth of the country is almost untouched, and if 

 the mining pablie of America knew Brazil better, I am persuaded 

 that the gold fields of that country would not be neglected by 

 American capitalists." 



"We may re-echo these encouraging words, substituting New 

 South "Wales for Brazil, and British for American capitalists. 



In concluding this division of my subject, 1 recommend to all 

 who wish to become acquainted with Brazil to read Mr. Hartt's 

 work, in which will be found quotations from Mr. Nicolay, to 

 whom he confesses his obligations. 



I may add that Mr. Nicolay is at present in Western 

 Australia, from which Colony I have lately received, collected by 

 himself, a useful contribution to my cabinet, settling at the same 

 time the position of a fossiliferous locality of which I was in 

 doubt. 



But I must not omit to state that, in addition to Mr. Hartt's 

 work, Captain Burton's volumes on the Highlands of Brazil 

 should be consulted. The greatest amount of statistical know- 

 ledge of all kinds in connection with Minas Greraes is, however, 

 to be found in the most valuable contribution " On the Grold 

 Mines" of that province, contributed by that accurate observer 

 and expounder, W. J. Henwood, F.H.S., F.Gr.S., to the eighth 

 volume of the Transactions of the Geological Society of Cornwall, 

 published in 1871, — a volume filled by that author's most clear 

 and wonderfully elaborate papers on mineral districts in South 

 America, North America, India, Spain, France, England, Ireland, 

 and Scotland. 



