PHYSIOLOGY OF SMOOTH AND STRIATED MUSCLE 



551 



Experiment 7 

 October I4, 1910 

 Muscle from stomach of frog 6, weighed fresh 0.156 gram 

 12.00 M. immersed in 0.2 per cent NaCl solution 

 12.10 P.M. weighed 0.178 gram 

 12.20 P.M. weighed 0.191 gram 

 12.30 P.M. weighed 0.202 gram 

 12.40 P.M. weighed 0.212 gram 

 12.50 P.M. weighed 0.217 gram 

 1.00 P.M. weighed 0.219 gram, fibers very much lengthened 

 4.20 P.M. weighed 0.228 gram, fibers still very much lengthened 

 11.20 A.M. October 15, weighed 0.224 gram, fibers still very much lengthened 



The temperature in this experiment was, unfortunately, not recorded, but was 

 probably not far from 20° 



Experiment 8 

 December 10, 1910 

 Sartorius from leopard frog 7, weighed 

 fresh 0.088 gram 

 12.28 P.M. immersed in Ringer 

 6.03 P.M. weighed 0.085 gram 

 11.17 A.M. December 12, weighed 0.089 

 gram 

 Rigor just beginning, but muscle is 

 still quite irritable 



Temperature varied between 16° and 

 20° 



Experiment 10 

 December 13, 1910 

 Stomach muscle from leopard frog 

 8,1 weighed fresh 0.056 gram 

 10.19 a.m. immersed in Ringer 

 11.19 a.m. weighed 0.060 gram, fibers 



markedly lengthened 

 12.48 P.M. weighed 0.061 gram 

 4.14 P.M. weighed 0.060 gram, fibers 



still lengthened 

 10.12 a.m. December 14, weighed 0.061 

 gram, fibers very much 

 lengthened and still 

 highly irritable 

 Temperature varied between 17° and 

 19° 



1 This frog weighed 14.2 grams. 



Experiment 9 

 December 10, 1910 

 Stomach muscle from leopard frog 

 7, weighed fresh 0.110 gram 

 10.33 A.M. immersed in Ringer 

 11.43 A.M. weighed 0.120 gram, fibers 

 lengthened 



12.30 P.M. weighed 0.125 gram 

 6.00 P.M. weighed 0.143 gram 



11.12 A.M. December 12, weighed 0.131 

 gram, fibers still length- 

 ened; muscle still quite 

 irritable 

 Temperature varied between 16° and 

 20° 



Experiment 11 

 December 13, 1910 

 Stomach muscle from leopard frog 9,^ 

 weighed fresh 0.065 gram 



10.31 A.M. immersed in Ringer with- 



out NaHCOg 

 11.31 A.M. weighed 0.072 gram, fibers 



considerably lengthened 

 12.58 P.M. weighed 0.074 gram 

 4.18 P.M. weighed 0.082 gram, fibers 



markedly lengthened 

 10.17 A.M. December 14, weighed 0.085 



gram, fibers enormously 



lengthened and still 



highly irritable 

 Temperature varied between 17° and 

 19° 



'^ This frog weighed 12.7 grams. 



