■ Donaldson AND ScHOEMAKER, Absorption of Water. 191 



Series III comprises observations on ten pairs of frogs. 



The absorbing frog was eviscerated immediately after death 



and allowed to remain in the jar for twenty-four hours. As in 



Series I, the results are presented in three groups, arranged 



according to the average weight of the frogs forming the 



groups. 



TABLE in. 



Body weight in grams. Percentage Gain in Absorbing Frog. 

 Extremes. Average. Average. Extremes. 



On comparing the average percentages for the three 

 groups in Series III with those already given for Series I. they 

 appear so nearly alike that we may conclude that eviscerating 

 the absorbing frog immediately after death has no marked 

 influence in the gain of weight by the spinal cord. This would 

 seem to preclude the action of micro-organisms entering the 

 body after death from the alimentary tract as a factor in 

 increasing the weight of the cord of the absorbing frog. Up 

 to this point, all the observations on the absorbing frog had 

 been carried on at the temperature of the tap water or a little 

 above it, and hence in Series IV, a much lower temperature 

 was tried to determine the effect of reducing the temperature of 

 the absorbing frog. 



Series IV. — General Conditions — August 16-23, 1900. 

 Both frogs of each of the thirteen pairs were normally satu- 

 rated with water. The absorbing frog was eviscerated imme- 

 diately after death and kept in a refrigerator at 3-10° C for 

 twenty-four hours. Room temperature 10 a. m., 22-28° C. 

 Records in three groups according to average body weight. 



