MEMORIAL OF C. W. DRYSDALE 33 



the mineralogical character, mode of occurrence, and genesis of the differ- 

 ent types of ore deposits, Drysdale applied to the directing of development 

 work in search for ore and with very successful results. He showed that 

 there were at least two periods of mineralization: in the first and main 

 period, following the intrusion of the Trail batholith of granodiorite and 

 monzonite during Jurassic time, there were magmatic emanations con- 

 taining copper, sulphur, nickel, iron, gold, lead, silver, cobalt, antimony, 

 and molybdenum; in the second period, following the intrusion of the 

 Coryell batholith of pulaskite of Miocene age, there were alkaline solu- 

 tions containing gold During the first period, bodies of sulphide ores 

 were developed by processes of replacement along fissure and shear zones 

 formed chiefly in the cover rocks of the Trail batholith and along forma- 

 tional contacts, while the mineralization of the second period was of the 

 character of secondary enrichment. 



That Drysdale's work was appreciated by the mining men of Rossland 

 was shown at a meeting of the Western Branch of the Canadian Mining 

 Institute on October 26, 1916, in Trail, British Columbia, when the fol- 

 lowing resolution was submitted by Mr. M. E. Purcell, the superintendent 

 of the Consolidated Mining and Smelting Company's Center Star-AYar 

 Eagle grou23 of mines : 



"Resolved, That we express our liearty appreciation of Dr. Charles Wales 

 Drysdale's valuable contribution to economic geology in the work entitled 

 'The Geology and Ore Deposits of Rossland, British Columbia.' " 



In supporting the resolution, Mr. S. G. Blaylock, assistant manager of 

 the Consolidated Mining and Smelting Company, said: 



"The work which Doctor Drysdale has accomplished in this section can only 

 be appreciated thoroughly by those who know the Rossland camp. He has 

 solved numerous problems and pointed out a great many things that were not 

 before known to any of us. His work was all the more valuable in that as it 

 progressed he instructed various men interested in the district in the different 

 rock formations and ore-bearing measures, so that we did not have to wait a 

 long period of time until his completed report could be issued before we could 

 take advantage of the knowledge he gained at Rossland. I may say that his 

 findings have been of real value in laying out development work in the mines 

 of the camp. I am sure we all give Doctor Drysdale every credit and wish 

 him the great success he deserves." 



It is pleasing to. think that Drysdale lived to receive the above sincere 

 tribute to the merit of his work. Moreover, the Consolidated Mining and 

 Smelting Company offered him a position on their staff at a salary very 

 much larger than he was receiving, but to him, money was no measure of 

 results achieved, and, in additioli, feeling that during the war his country 



