18 SANITARY PRIVY. 
raised and lowered. The liquefying tank is filled with water up to. 
the point where it begins to trickle into the effluent tank. . 
As an insect repellent a thin film of some form of petroleum may 
be poured on the surface of the liquid in each barrel. 
Practical working of the apparatus.—When the privy is to be used, 
the rod is pulled up so that the antisplashing board rises to within 
about 1 inch below the surface of the water. The fecal material 
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Fic. 4.—Inside view of L. R. S. privy. 
falls into the water, but this board prevents splashing, and thus 
overcomes one of the greatest objections thus far raised to the wet 
system. After use, the person sinks the antisplashing board by 
pushing down the rod, and the fecal matter then floats free into the 
water. 
Although some of the fecal matter floats, it is protected both from 
fly breeding and fly feeding in the following ways: First, by the 
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