10 



BULLETIN 1339, U. S. DEPARTMENT OF AGRICULTURE 



'& 6 7 3 9 /O // 72'/ 2 & 4- £> 6 7 3 9 /O // /2* 7 2 3 4 6* 



Fig. 3. — Graphs indicating changes of weight in colony AB, May 22, 1922. The solid line shows the 

 cumulative weights; the shaded areas the variations in weight from hour to hour 



