FIG 40 DETAILS OF CONSTRUCTION OF WISCONSIN OR LORE1T2 

 DIRT TESTER 



The central cylinder A, through which the milk is poured is 2J inch 

 in diameter and 6 inches long, surrounded by a steam or hot water 

 jacket and with a half-inch intervening space. The steam or hot water 

 enters at the lower opening and overflows at B. The brass cap C slips 

 over the bottom of the inner cylinder and is held in place by a clamp 

 rod D. This cap contains a circle of wire gauze E, over which is placed 

 the disc of absorbent cotton. The cap may be quickly removed by 

 swinging the clamp rod D to one side and the dirty filter tnay be 

 replaced by a clean one. 



