GEOLOGICAL. SURVEY OF CiLUAXDA. 

 ALFRED E. C. SELWYN, F.R.S., F.G.S., Director. 



CHEMICAL CONTRIBUTIONS 



GEOLOGY OF CANADA. 



LABORATORY OF THE SURVEY 



CHRISTIAN HOFFMANN, F. Inst. Chem. 

 Chemist and Mineralogist to the Survey. 



PUBLISHED BY AUTHORITY OF PARLIAMENT. 



Montreal : 



DAWSON BROTHERS. 



1880 



