14 SANITARY PRIVY. 
The kinds of privies that are not sanitary.—If the excreta are scat- 
tered broadcast, the infection they contain is also scattered far and 
wide. If the excreta are deposited in one place, the infection they 
contain is more restricted. Therefore, any kind of privy is better 
than none. From a faulty privy, however, much infection may be 
spread in various ways, as, for instance, by drainage and seepage, 
or by chickens, swine, and dogs, or by the feet of persons, or by 
insects, especially flies. 
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Fic. 2.—An insanitary privy, open in back. (Stiles, 1910.) 
Figure 2 represents a dangerous type of privy. On a systematic 
rating it should not be marked higher than 10 on a scale of 100, there- 
fore it is 90 per cent below perfect. The protection afforded by this 
privy depends in great measure upon the frequency with which the 
excrement is removed. But even if this privy is cleaned every day, 
chickens, hogs, and flies have access to the fresh night soil for a 
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