PHYSIOLOGY OF SMOOTH AND STRIATED MUSCLE 



563 



Experiment 54 

 March SO, 1911 

 Sartorius of green frog 32, weighed 

 fresh 0.144 gram 

 11.16 A.M. immersed in Ringer 

 1.10 P.M. weighed 0.138 gram 

 1.18 P.M. weighed 0.137 gram 

 1.26 P.M. weighed 0.136 gram 

 1.34 P.M. weighed 0.136 gram 

 1.42 P.M. weighed 0.137 gram 

 1.50 P.M. weighed 0.136 gram, trans- 

 ferred to double strength 

 Ringer 

 1.58 P.M. weighed 0.127 gram 

 2.06 P.M. weighed 0.123 gram 

 2.14 P.M. weighed 0.121 gram 

 2.22 P.M. weighed 0.1195 gram 

 2.30 P.M. weighed 0.118 gi-am 

 2.38 P.M. weighed 0.117 gram 

 2.46 P.M. weighed 0.116 gram 

 2.54 P.M. weighed 0.115 gram 

 3.02 P.M. weighed 0.114 gram 

 3.10 P.M. weighed 0.113 gram 

 3.18 P.M. weighed 0.112 gram 

 3.26 P.M. weighed 0.112 gram 

 3.34 P.M. weighed 0.1125 gram 

 3.42 P.M. weighed 0.112 gram 

 3.50 P.M. weighed 0.111 gram 

 3.58 P.M. weighed 0.111 gram 

 4.13 P.M. weighed 0.1115 gram, still 

 somewhat irritable, but 

 contraction is very slow 

 4.56 P.M. weighed 0.114 gram 

 9.50 A.M. March 31, weighed 0.152 

 gram, entirely unirritable, 

 but shows little sign of on- 

 coming rigor; transferred 

 to Ringer 

 11.10 A.M. still entirely unirritable, 

 little sign of oncoming 

 rigor 

 Temperature varied between 18° and 

 21" 



Experiment 55 

 March 30, 1911 

 Portion of stomach muscle of green 

 frog 32, weighed fresh 0.182 gram 

 11.12 A.M. immersed in Ringer 

 1.06 P.M. weighed 0.205 gram, fibers 



much lengthened 

 1.14 P.M. weighed 0.202 gram, fibers 

 much shorter than at 1.06 

 1.22 P.M. weighed 0.197 gram 

 1.30 P.M. weighed 0.190 gram 

 1.38 P.M. weighed 0.188 gram 

 1.46 P.M. weighed 0.188 gram, fibers 

 now still shorter than at 

 1. 14; transferred to double 

 strength Ringer 

 1.54 P.M. weighed 0.179 gram 

 2.02 P.M. weighed 0.162 gram, fibers 

 markedly further short- 

 ened 

 2.10 P.M. weighed 0.151 gram 

 2.18 P.M. weighed 0.148 gram 



2.26 P.M. weighed 0.144 gram 

 2.34 P.M. weighed 0.141 gram 

 2.42 P.M. weighed 0.140 gram 

 2.50 P.M. weighed 0.141 gram 

 2.58 P.M. weighed 0.142 gram 

 3.06 P.M. weighed 0.142 gram 

 3.14 P.M. weighed 0.1425 gram 

 3.22 P.M. weighed 0.143 gram 

 3.30 P.M. weighed 0.144 gram 

 3.38 P.M. weighed 0.145 gram 

 3.46 P.M. ^yeighed 0.145 gram 

 3.54 P.M. weighed 0.146 gram 



4.09 P.M. weighed 0.148 gram, fibers 

 still shortened; they show 

 a marked tendency to 

 lengthen on stimulation 

 after a latent period of 

 about 20 seconds^ 



4.27 P.M. transferred to Ringer 

 9.00 A.M. March 31, fibers somewhat 



longer than at 4.27 yester- 

 day and highly irritable 

 Temperature varied between 18° and 

 21° 



See p. 509 



