296 ELLIXOR HELENE BEHRE. 



TABLE IV. 



Time Between Beginning 



of Experiment and 



First Noticeable Color COz Production. 



No. Difference. Control Lots. Experimental Lots. 



! i hr. medium-medium > low-medium 



2^ hrs. 



2 5 hrs. 



i t tt n 



3 2 hrs. 



4 hrs. 



4 iM hrs. 



5 2K hrs. 



3Mhrs. 



6 M hr. 



7 Khr. 



6 hrs. 



8 J^ hr. 



1 hr. 



9 i hr. 



10 (heads present) % hr. 



11 Yz hr. 



12 3 hrs. 



13 (heads present) Y 2 hr. 



14 H hr. 



iK hrs. 

 3 hrs. 



15 (heads present) zYt hrs. < . 



16 3M hrs. 



17 H hr. 



18 H hr. 



19 (heads present) i^ hrs. 



20 iH hrs. 



21 i hr. 



2 hrs. > 



22 3 hrs. 



23 *A hr. 



24 M hr. 



which they were tested produced more CO 2 in the same length 

 of time than similar worms acclimated to and tested at the higher 

 temperature. The only exception in this group belonged to a 

 series exceptional in character throughout with no apparent 

 reason for its non-conformity except individual variations in rate. 

 As a check upon this one series three other series with the same 

 temperature conditions were tried later. The same length of 

 time in the living temperature was allowed, the worms were 

 weighed very carefully and tested with the most delicate indi- 

 cator; under these conditions the typical result was obtained. 



