556 



EDWARD B. MEIGS 



Experiment 27 



January 26, 1911 

 Strip of stomach muscle from large 

 bull-frog 20/ weighed fresh 0.120 gram 

 4.30 P.M. immersed in Ringer 

 5.30 P.M. weighed 0.131 gram, fibers 



somewhat lengthened 

 9.30 A.M. January 27, weighed 0.143 

 gram, fibers somewhat 

 longer than at last weigh- 

 ing; still highly irritable 

 10.15 A.M. January 28, weighed 0.133 

 gram, fibers shortened and 

 still fairly irritable 

 Temperature varied between 20° and 

 22° 



1 This frog weighed over 150 grams. 



Experiment 28 

 January 26, 1911 

 Strip of stomach muscle from large 

 bull-frog 20,2 weighed fresh 0.113 gram 

 4.35 P.M. immersed in Ringer without 

 NaHCOs, to which had 

 been added 0.01 per cent 

 lactic acid 

 5.35 P.M. weighed 0.117 gram, fibers 



somewhat lengthened 

 9.35 A.M. January 27, weighed 0.112 

 gram, fibers shorter than 

 at last weighing 

 10.55 A.M. still somewhat irritable 

 10.20 A.M. January 28, weighed 0.103 

 gram, fibers still short- 

 ened and no longer irrit- 

 able 

 Temperature varied between 20° and 

 22° 



' This frog weighed over 150 grams. 



Experiment 29 

 January 80, 1911 

 Tendo Achillis of leopard frog 21, weighed fresh 0.025 gram 

 11.05 A.M. immersed in 7.5 per cent cane sugar solution 

 11.50 A.M. weighed 0.029 gram 

 2.07 P.M. weighed 0.029 gram 

 4.07 P.M. weighed 0.029 gram 

 10.07 A.M. January 31, weighed 0.028 gram 

 Temperature varied between 19° and 22° 



Experiment 30 

 January 31, 1911 

 Sartorius of small bull-frog 22,^ 

 weighed fresh 0.161 gram 

 12.55 P.M. immersed in Ringer 

 1.25 P.M. weighed 0.154 gram 

 '3.55 P.M. weighed 0.152 gram 

 11.55 A.M. February 1, weighed 0.145 

 gram, still highly irritable 

 Temperature varied between 19° and 

 21° 

 1 This frog weighed 40.3 grams. 



Experiment 31 



January SI, 1911 

 Stomach muscle of small bull-frog 

 22,2 weighed fresh 0.331 gram 

 12.15 P.M. immersed in Ringer 

 12.45 P.M. weighed 0.320 gram, fibers 



not lengthened 

 3.15 P.M. weighed 0.327 gram, fibers 



slightly lengthened 

 11.15 A.M. February 1, weighed 0.355 

 gram, fibers somewhat 

 longer than at last weigh- 

 ing, and still very highly 

 irritable 

 Temperature varied between 19° and 

 21° 



2 This frog weighed 40.3 grams. 



