PHYSIOLOGY OF SMOOTH AND STRIATED MUSCLE 553 



Experiment 16 

 December 19, 1910 



Stomach muscle of leopard frog 13, weighed fresh 0.152 gram 

 12.00 M. Immersed in Ringer without NaHCOa 

 12.20 P.M. weighed 0.161 gram, fibers somewhat lengthened 

 3.10 P.M. weighed 0.173 gram 

 5.25 P.M. weighed 0.171 gram 

 10.20 A.M. December 20, weighed 0.168 gram, fibers much lengthened and still 



quite irritable 

 9.40 A.M. December 21, fibers showed tendency to lengthen on stimulation^ 

 Temperature varied between 17° and 21" 



1 See p. 509. 



Experiment 17 

 December 20, 1910 



Sartorius of green frog 14, weighed fresh 0.124 gram 

 10.08 A.M. immersed in Ringer 

 11.14 A.M. weighed 0.117 gram 



11.22 A.M. weighed 0.115 gram . 



11.30 A.M. weighed 0.115 gram, transferred to half strength Ringer 

 11.38 A.M. weighed 0.122 gram 

 11.46 A.M. weighed 0.127 gram 

 11.54 A.M. weighed 0.130 gram 

 12.02 P.M. weighed 0.134 gram 



12.32 P.M. weighed 0.139 gram 

 2.14 P.M. weighed 0.147 gram 

 4.14 P.M. weighed 0.147 gram 



10.14 A.M. December 21, weighed 0.136 gram, still highl}' irritable 

 Temperature varied between 18° and 20° 



Experiment 18 

 January 10, 1911 



Stomach muscle of leopard frog 15, weighed fresh 0.160 gram 

 10.27 A.M. immersed in Ringer 



11.27 a.m. weighed 0.179 gram, fibers somewhat lengthened 

 12.27 P.M. weighed 0.187 gram 



2.33 P.M. weighed 0.202 gram, fibers much lengthened 



4.33 P.M. weighed 0.202 gram 



11.33 A.M. January 11, weighed 0.210 gram, fibers still lengthened and highly 



irritable; temperature varied between 19° and 23° 



