44 



Testing Milk and Its Products. 



frame in which the "bottles are placed, one in each 

 socket; the metal plate E is put over the necks of the 

 bottles which pass through the holes in it up to the 

 shoulder of the bottles. The pins F, F, are then pushed 

 through holes in the rods D-D, and the plate and bot- 

 tles are thus firmly held in the crate. When secured in 



FIG. 16. A convenient devise for cleaning test bottles. 



this way, the frame full of bottles may be placed in a 

 pail or tank of hot water as in I. They will soon fill 

 with water and the time of filling the bottles one at a 

 time thus saved. When ready to empty the bottles, the 

 frame is reversed and placed in the position shown in II. 

 One or two rinsings in boiling hot water is usually 

 sufficient to effectually clean the bottles, but when they 

 have been allowed to get greasy they can be dipped into 

 a pail of hot dilute lye; this will saponify the grease 

 and after one or two rinsings in clean hot water the 

 bottles will be bright and clean. 



