[MCLENNAN & shrum] LIQUEFACTION OF HYDROGEN 193 



Through conversation and correspondence I gained much in- 

 formation from him that enabled me to expedite the construction and 

 installation of our cryogenic equipment. To him I offer my sincere 

 thanks. 



J. C. McLennan. 

 Physical Laboratory, 



University of Toronto. 

 June 15, 1922. 



13— C 



