6 



KENT AND TAYLOR. 



This was also adapted to pressures of several atmospheres as the glass 

 windows and fibre plugs were held in place by threaded rings. 



Quartz vacuum tubes — even pyrex glass having proven unsuit- 



Waier infaKe 

 \ 



vzm^ 



^ 



I 



To vacuum pump 

 t 



Wafer ouilef 



Wafer infaKe 



i 



C 



i 



4ZO 



^^1 



Wafer ouflef 



Figure 4. C, C, cork stoppers; R, R, rubber sponges; T, T, terminals. 



T 



io H, generator 

 and 

 dryino apparatus 



To vacuum 

 pumps 



Figure 5. T, tube; M, manometer; B, bulb. 



able — of various forms, the most successful of which, for salts such as 

 lithium chloride, proved to be that shown in Figure 4 in which fine 

 brass wire, often in helical form, was fitted into brass caps, 6 mm. in 



