THRESH S DIkSINFECTOR 



369 



chloride of calcium, conveyed through a ball-cock from a 

 service cistern. The steam, which is formed at the top of 

 the boiler, is conducted down from the cylinder and 

 admitted to the disinfecting chamber at the bottom, being 

 allowed continuously to escape. This stove uses no 

 pressure, and cannot, therefore, be fitted with a recording- 

 gauge. The object of the chloride of calcium is to obtain 





J'. 



Fig. 35. — Theesh's Disinfectoe. 



a higher temperature in the steam than that due to the 

 pressure. 



Reek's Disinfector. — This disinfector is made to work 

 with a pressure of one-ninth of an atmosphere, equal to, 

 say, If lb. per square inch. Air is evacuated in a manner 

 similar to that adopted in the Equifex disinfector, but the 

 thermometer recording the temperature at which disinfec- 

 tion is considered to begin is placed at the door of the 

 disinfector instead of in the discharge-pipe. The steam 

 escapes under a safety-valve during the operation, and is 

 more or less condensed at the end by the admission of 



24 



