16 



BULLETIN" 1339, IT. S. DEPARTMENT OF AGEICULTUBE 



7VA>/£r or £>S?V 



+600 

 +SOO 

 +<ZOO 

 + 300 

 + 200 

 +/OO 

 O 

 -/OO 

 -ZOO 



+ VOO 

 + 600 

 + &VO 

 +4-00 

 + 300 

 + 200 

 + /OO 

 O 

 -/OO 

 -ZOO 

 -i300 



Fig. 6 (a). — Daily graphs for six consecutive days of colony 2, showing hourly changes in weight (see 



Table l) 



