Vitamin A In Beef, Pork, and Lamb 
-Gage used for housing individual experimental rats, showing parts 
-Rat cage set up ready for use. The self-feeder and drinking vessel have been placed in the cage 
—Self-feeder for rats showing parts 
—Drying oven with doors open showing pans for holding meat or casein and electro-heating 
on the bottom of the oven 
-Oven used for drying meat and for drying casein. The inside dimensions are 30 by 27 by 20 
:s. The walls and doors are 1 inch thick and are filled with asbestos. The oven is made of 
.nized iron. The blower shown at the left has a 2M-inch outlet and is run by a one-tenth 
power motor. The air outlet is at the upper right end of the oven and lower down are shown 
nometers. The switch in front of the blower controls the heating units in the bottom of the 
-View in animal laboratory of the biochemic division showing vitamin feeding tests in pro- 
. This stack of shelves accommodates 128 cages and a like number of rats 
