'278 



PROF. W. A. BONE AND OTHERS ON 



passages to facilitate the outflow of the compressing liquid into a special graduated 

 reservoir underneath the experimental table during the" inflow of the gas from the 

 holder ; the same valve on being closed to the said reservoir simultaneously opens 

 connections with the compressing pump. 



TO LITRE GAS HOLDER 



TO STORAGE CYLINDER 



mo SAUGE THROUGH 



3- WAY CONED VALVE. 



FROM OPPRESSING PUMP 



TO KSCKVOIK FOR COMPRESSING U9UIO 



Fig. 1. 



The compressing pump (fig. 2) is constructed out of an iron casting into which is 

 fitted a bronze valve body and piston. It has two valves inlet, A, and outlet, B - 

 and also a third valve, C, for releasing any gas which may accidentally become 

 imprisoned in the head of the pump. The valves are all of bronze and easily 

 accessible for cleaning purposes. The piston, which is worked by means of a, 



