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.” 
