APPENDIX B LXVll 



the Empire. In this connection the lecturer pointed out a beginning 

 had already been made. 



Through financial aid received from the Honorary Advisory 

 Council for Scientific and Industrial Research of Canada, supple- 

 mented by a considerable grant from the University of Toronto and 

 by assistance from the British Admiralty and the Hydro-Electric 

 Commission of Ontario an equipment consisting of motors, compres- 

 sing pumps, gas purifiers and liquefiers had been secured and were 

 being installed in the Physical Laboratory at Toronto. 



Already the Liquid Air Machine was in operation and was 

 capable of producing as much as 600 pounds of liquid air a day. 



The hydrogen liquefying machine was installed and had already 

 been used on several occasions for producing quantities of liquid 

 hydrogen. 



The helium liquefying machine was in process of construction 

 and erection and it was expected that it would soon be ready to 

 produce liquid helium. From the progress which had been made so 

 far it would be seen that as a result of the research on helium 

 the basis had been laid for the establishment of an industry capable 

 of producing helium in quantity, sufficient to meet the needs, to a 

 considerable extent, of the Empire in aeronautical warfare. 



Further, the researches had shown that there was considerable 

 promise of helium being likely to be useful for the construction of 

 lamps of certain types. 



In the Cryogenic laboratory, established in the University of 

 Toronto, it would be possible by the aid of liquid helium and liquid 

 hydrogen to carry on numerous investigations on the properties of 

 matter at temperatures almost as low as absolute zero. 



In the course of his lecture Professor McLennan showed a number 

 of experiments with liquid air and in dealing with the question of the 

 utilization of helium in lamps he showed a number of beautiful 

 experiments on the phenomena of fluorescence. This phenomenon, 

 he pointed out, constituted the foundation of many of the researches 

 which were now being vigorously prosecuted with the object of 

 producing illuminating devices more efficient than even the best of 

 the lamps now in use. 



In the course of his lecture Professor McLennan expressed his 

 appreciation of the assistance he had received in the Helium Research 

 from Professors Satterly, Burton, Dawes and McTaggart, and from 

 Mr. John Patterson, of the Meteorological Office, Toronto, as well 

 as from Messrs. Lang, Ainslie, Foreman and Shrum, of the University 

 of Toronto, and Mr. Elworthy, of the Mines Branch, Ottawa. 



