STERILIZATION UNDER PRESSURE. 77 



for use in the kitchen. It is called the " Arnold steam 

 sterilizer." It is very ingenious in its construction as 

 well as economical in its employment. 



The difference between this apparatus and that just 

 described is that it provides for the condensation of the 

 steam after its escape from the sterilizing chamber, and 

 returns the water of condensation automatically to the 



FIG. 9. 



Arnold steam sterilizer. 



reservoir, so that in practice the apparatus requires but 

 little attention, as with ordinary care there is no likeli- 

 hood of the water in the reservoir becoming exhausted, 

 with the consequent destruction of the sterilizer. 

 Fig. 9 shows a section through this apparatus. 



STERILIZATION UNDER PRESSURE. 



The advantages of the use of steam under pressure 

 for the purposes of sterilization have received such 



