154 



DISINFECTION AND STERILIZATION 



which a deep crater is made for the placement of from 1 

 to 2 pints of crnde carbolic acid. The edge of the crater is 

 thereupon pushed into the fluid, when a lively reaction fol- 

 lows. Owing to the heat generated, it is advisable to place 



Fig. 109. — Formaldehyde 

 generator used in city work for 

 room disinfection. 



Fig. 110. — Government formalde- 

 hyde generator. 



the chloride of lime in an iron crucible (pot), and to have 

 nothing inflammable within a radius of two feet. The num- 

 ber and location of these cones of chloride of lime depend 

 on the size and structure of the building to be disinfected. 



