Il.MI'KRATURES IX TURTI.I-. 435 



The board was then supported at either end high enough above 

 the table th.it the animal could not get sufficient traction to 

 .'.1. In this position the tail could be tied back and the 

 thermometer in-.-rted in the rectum. 



I ; riinents with water as the surrounding medium were 

 more difficult to carry out, and involved the construction of 

 ntainers which could be adapted to different >i/cs of 

 individual- Fig. 1 . Shallow tin dishes of convenient sizes were 

 loiind to tit the purpose, allowance being made so that a Moppered 

 thermometer < ould be supported at the side. In mounting, the 

 thermometer could be slipped into the rectum, and the animal 

 made fa-t by adjustable wire clamps. Mounted in thi> \\a\ the 

 ~pei imt-ii ould be subjected to an ice mixture and its ch.u 

 in body iture as well as those of the environment be 



id d. 



Although -ome slight variations in the experimental technique 

 ueie !<u]..\\<d for checking puq>oses, in general the procedure 

 in all cases iiuoKed the tabulating of the date of the experiment 

 ami the time intervals of the observations, the room, as \\ell 

 a- the immediate environmental and the subject's temperature, 

 the -ul number and its weight, and remarks on the belia\ im 



and ! activities of the animal, under the conditions of 



the < |" i iment. Some forty experiments exclusive of 

 preliminary observations, furnish data for this report, the-e 

 being apportioned about equally between the two forms of 

 turtle- -tmlied. lor convenience, the discussion of result> are 

 iped under t he following captions: 



Hmly r,-:/>,-r,:!nre Find nations in the Non-critical Ran 

 In I thirteen experiments, the diurnal anil nocturnal 



fluctuation^ in budy temperature were taken on indi\idual- of 

 the painted and snapping varieties, both in air and water. A 

 typical (hart of observations taken at intervals over a t\\el\e- 

 hoiir period from a painted turtle mounted in air, weighing 4*5 

 gram- i- -i\ en in Table I. 



In general it is noted that the body temperature lag- from one 

 to three degrees as the temperature rises, and remain- -lightly 

 abo\ e as it is lowered, being slightly effected by the state of 

 the activity of the animal. The same fluctuations are apparent 

 during the nocturnal intervals. Similar observations \\ere made 



