ArPKN'lJIX 



351 



mainder to evaporate under the influence of the heat from 

 the jacketed walls of the chamber. 



The Equifex Disinfector. — The Equifax disinfector for 

 absolute disinfection is cylindrical and has no jacket. 

 Steam is admitted to coils at the bottom, and in some 

 cases also at the top of the disinfecting cylinder at a 

 pressure of about 50 lb., and serves to communicate to the 

 steam so much heat as is lost by radiation through the sides 



Fig. 32. — Equifex Disinfector. 



and doors. Air is eliminated by allowing the steam on first 

 admission to blow off through an outlet-pipe carrying a 

 thermometer, which should register 95° C. before disinfec- 

 tion proper begins. In this way the air from the stove is 

 got rid of ; and by intermitting pressure for five minutes 

 the air in the pores of the objects is likewise driven out on 

 the sudden expansion of the volume of vapour condensed 

 in them. The working pressure of steam is 10 lb. per 

 square inch ; and, the steam being saturated, its pressure, 

 and therefore its temperature, can accordingly be recorded 

 on an automatic recording-gauge. Objects are dried by 



