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 mm. between the plates. These copper 

 bottoms after a time become burned out, and unless they 

 are replaced the apparatus is useless. The older form 



FIG. 4. 



FIG. 5. 



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 b 

 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 should 



