ORDINARY MEETINGS XXXIll 



Prof. Albert G. Nicholls, M.D., D.Sc, Dalhousie 

 University, delivered a popular lecture on "Insects as Vectors 

 of Disease," illustrated by lantern-slides and microscopical 

 demonstration. 



Fifth Ordinary Meeting. 



Physiological Lecture Room, Dalhousie College, Carleton St., 

 Halifax, 1 8th April, 1921. 



The President, Dr. Cameron, in the chair. 



A paper by Charles Alex. Vickery, B.A., Dalhousie 

 University, entitled "The Effect of Thermoluminescence on 

 Electrical Conductivity," was read by title. 



Prof. James A. Dawson, Ph.D., Dalhousie University, 

 delivered a popular lecture on "Some Problems in Protozoology," 

 illustrated by lantern-slides. The subject was discussed by the 

 President, Dr. Johnstone, E. C. Allen, Dr. Fraser Harris, 

 Prof. Bell and Prof. Nicholls. 



Sixth Ordinary, Meeting. 



Physiological Lecture Room, Dalhousie College, Carleton St., 

 Halifax, 9th May, 1921. 



The President, Dr. Cameron, in the chair. 



It was reported that Prof. Walter Percy Copp, B.Sc, 

 Dalhousie University, had been elected a member on 28th 

 April. 



Earle F. Whyte, B.A., Dalhousie University, read a 

 paper entitled "A Study of the Extraction of Potash from Ortho- 

 clase Feldspar, by Carbon Dioxide and Sulphur Dioxide." 

 (See Transactions, p. 145). The subject was discussed by the 

 President, Prof. Nickerson. Dr. Johnstone, Mr. Todd, 

 Prof. McIntosh and Mr. Piers. 



A paper by Dr. A. H. MacKay, "Phenological Observ- 

 ations, Nova Scotia, for 1920," was read by title. (See Tran- 

 sactions, p. 153.) 



