352 



APPLIED BACTEKIOLOGY 



opening a valve at the bottom of the dishifection chamber 

 for the admission of air, and determining a slight aspira- 

 tion at the upper part of the stove. 



The Equifex Low-pressure Disinfector. — This consists of a 

 disinfection cylinder, momited on either one or two cylinders, 

 which serve as steam-generators. The pressure of steam, 

 which is usually 2 lb. per square inch, is controlled by the 

 use of a water-seal. The air contained in the disinfector 

 is blown out by the steam on admission, and the steam 



Fig. So. — Thresh's Disinfector. 



continuously to escape. For 

 d by passage through pipes 

 he generator is passed over 

 A recording-gauge is usually 

 -^^ ^^anges of temperature. 

 This consists of a disinfecting 

 chamber surrounded by a boiler containing a solution of 

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

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



Thresh's Disinfector. 



