44 



Testing Milk and Its Products. 



test bottles must be rinsed twice with hot water aftei 

 they are taken from this bath. 



An excellent cleaning solution that can be used for 

 a long time, may be made of one-half pound bichromate 

 of potash to one gallon of sulfuric acid. 1 



473. An arrangement for cleaning a number of test 

 bottles at the same time is shown in fig. 16. 2 III shows 



A convenient device for cleaning test bottles. 



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

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

 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 thus firmly held in the crate. When secured in 

 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 



1 Michels, Am. Cheesemaker, Jan. 1903. 



2 Wisconsin experiment station, bull. 129. 



