ON BUTTERMAKING 75 



Excessive skim milk and such material useful for 

 feeding purposes should not be wasted in sewage, 

 but should be carted away and fed to hogs. 



When the laws of the state permit the direct 

 disposal of creamery sewage into lakes and large 

 rivers, it makes a most satisfactory system. In the 

 case of small rivers and other small bodies of 

 water, however, most states have laws preventing 

 their use for such purpose. Then it becomes neces- 

 sary to use one of the other systems. If the soil 

 surrounding the creamery is of a sandy nature, it 

 will have good filtering qualities so that a cess- 

 pool placed at a safe distance from the well should 

 answer in most cases. 



When the surrounding soil is of clay and with 

 little elevation, it becomes necessary to construct 

 a filter bed of sand and stone and to pass the sew- 

 age first through a septic tank. 



