32 



THE ROYAL SOCIETY OF CANADA 



CE/VEP/lL Af^/^AAiS£M£A/r OF TH£ CYCLE 



a blow off S, and a pressure gauge E. The hydrogen in this cylinder 

 was maintained throughout the operation at a pressure of about one 

 pound per square inch above atmospheric pressure. From the 

 cylinder R the hydrogen passed into a Peter Brotherhood 10 horse- 

 power three stage compressor, C, where it was compressed to upwards 

 of 170 atmospheres. 



W was a water separator provided with a blow-oft' P, and Diand 

 D2 were two purifiers filled with caustic potash to dry the gas. From 

 D2 the compressed gas passed through a cooling bomb Gi and thence 

 into a heavy walled steel bomb B. This bomb was filled with pal- 

 ladiumized asbestos and was heated by an external electric furnace 

 LM to upwards of 400°C. 



The palladiumized asbestos acted as a catalyser and brought 

 about combination between hydrogen and the small fraction of oxygen 

 present in it. From the bomb B the gas passed through a second 

 cooling bomb G2 and thence through two caustic potash driers, D3 

 and D4, to the liquéfier. Outlets at Ki, Ko and K3 provided a means 

 of attaching the katharometers with which the gas was tested. As 

 the plate shows, the low pressure cylinder R was provided with a tube 

 for the admission of the pure unused hydrogen which came from the 

 liquéfier after the final expansion. 



