BACTERIA. 29 



or if the pipe is too difficult of access for these 

 methods, a boiling hot solution of washing soda may 

 be poured down once a week, or when the ice box is 

 empty. 



The pan under the refrigerator should be scrubbed 

 carefully with hot soapsuds or scalded with the wash- 



FIG. 17. VARIOUS SPORE BEARING BACTERIA, 

 (a) Spores Escaping from Ruptured End. (After Conn.) 



ing soda, that no slime may appear. The escape 

 pipe, too, should be opened to the air and in a place 

 where the air will be pure. 



The housewife who allows her refrigerator pipe to 

 empty directly into a hole in the cellar floor, un- 

 derneath which is a slimy mass of muddy filth, need 

 not be surprised that milk and butter do not "keep 

 well." 



