119 



lower with a capacity of about locc for holding the milk and 

 acid, and the top with a capacity of about 40cc for holding 

 hot water to be used to elevate and keep fluid the layer of 

 fat. 



''The reading tube terminates in an inverted funnel so 

 fitting into the top part of the bottle by means of a trap to 



Fig. 121. 



allow water to pass through, but effectually prevent the loss 

 of fat. The tube is divided into sixty parts, each part repre- 

 senting one-tenth per cent fat with the zero mark at the top. 



"The illustration sufficiently shows construction of work- 

 ing parts. The maximum speed is about 2,000 revolutions 

 per minute, and the working speed 1,500 per minute, attained 

 by 60 revolutions of handle per minute. The crank is remov- 

 able. A substantial and handsome mahogany box with 

 handle is fastened by means of hooks. The entire machine 

 boxed occupies 8x8x9 inches. 



"In the box may be carried two 100 cc bottles of acid (40 

 tests), a combined milk and acid pipette, a lactometer and 

 thermometer. 



