The Water Supply and Drainage of Butter Factories. 725 



Another method suggested is that of the septic tank and coke 

 breeze filter bed. This method, however, is more expensive as far as 

 the initial cost is concerned, and takes about the same amount of 

 attention to keep it in good working order. It is not necessary with 

 fluids containing as little solid matter as is found in the drainage 

 from the butter or cheese factory. If care is taken to use the 

 shovelful of dry earth every evening no offence whatever will arise 

 even in the hottest weather, and I feel sure that a factory could 

 dispose of its own drainage on a half-acre in the middle of a large 

 town. 



