LYMPH FLOW 



13 



isotonic Ringer's solution and after molting is shown in 

 figure 2. In experiments 431 and 442 (fig. 2) the molt skin 

 was removed from the glove at the time indicated in the 

 figure, after which the gloves began to lose in weight con- 

 tinuously. A comparison of experiment 431 A (fig. 1) with 

 experiment 442 (fig. 2) illustrates the behavior of two skin 

 gloves taken from the same frog when filled with isotonic 

 Ringer's solution and suspended in the same solution at a 

 constant (431 A) and at different (442) temperatures. The 

 time of molting naturally varies greatly in different cases, 

 and is largely influenced by the temperature of the solution 



300 

 ZJ0 

 ZOO 



ISO 



III 



Gain 

 n 



Percent 

 a 

 2 



- if a 



-Z3'C. 



S 



d Mfllt S^m 



Z * 6 B ID II 



Hours 



2.0 ltl+?t 



32 I 



-W 41 



in which the glove is suspended. At the time of their removal 

 from the body, skins in which the rate of transport of water 

 is relatively slight show signs of molting earlier than those 

 in which the rate is higher. 



In most cases skin gloves, with the outside of the skin 

 turned outward, filled with isotonic Ringer's solution, imme- 

 diately begin to gain in weight and continue to do so for a 

 considerable time, either at a constant or at varying tempera- 

 tures, when suspended in the same solution. Exceptions to 

 this behavior are, however, found. In some instances a loss 

 in weight, instead of a gain, immediately succeeds the sus- 

 pension of the glove in Ringer though such temporary loss 

 is almost invariably succeeded by a gain. This form of be- 



