May, 1929] SIMPLIFIED TECHNIQUE FOR MEASURING ENERGY 



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FEED ROOM 



METABOLISM 



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Figure 1 — Plan of main floor of Laboratory for Animal Nutrition 



C, respiration chamber for steers and cows, with feed box, f, water trough, d, small 

 water tank set on scales outside the chamber wall to weigh the daily amount given, W; 

 Blower, B, conducts fresh, outdoor air into respiration chamber; A, absorber table for 

 ahquoting of air from chamber and for removal of carbon dioxide from air; S, scales for 

 weighing animals; a, a, Carpenter gas-analysis apparatus; b, large balance to weigh car- 

 bon dioxide absorbers; c, control board with switches to operate electric motors, Ughts in 

 chamber; m, control board with voltmeter, ammeter, and switch to operate motor-gener- 

 ator for direct current electric supply; N, Sink, cupboards for dairy utensils, etc.; g, g, g, 

 ieces grids. 



