ORDINARY DRY STERILIZER. 



47 



iron bottom of the chamber. It consists of several 

 copper plates placed one above the other, but with a space 

 of about 4 to 5 ram. between the plates. These copper 

 bottoms after a time become burned out, aud unless they 

 are replaced the apparatus is useless. The older form 



Fig. 4. 



Fig. 



of sterilizers are so constructed that their repair is a 

 matter involving some time and expense. To meet this 

 objection I have had constructed a sterilizer in all re- 

 spects similar to the old form except in the arrangement 

 of this copper bottom. This is so made that it can be 

 easily slipped in and out, so that by keeping several sets 

 of copper plates on hand a new one can readily be 

 slipped into the apparatus when the old one is burned 

 out. 



In the employment of the dry sterilizer care sliould 



