554 



EDWAKD B. MEIGS 



Experiment 19 

 January 11, 1911 

 Portion of stomach muscle of leopard 

 frog 16, weighed fresh 0.063 gram 

 11.15 A.M. immersed in Ringer at room 



temperature (see below) 

 12.15 P.M. weighed 0.072 gram, fibers 



slightly lengthened 

 3.15 P.M. weighed 0.076 gram, fibers 



considerably lengthened 

 5.15 P.M. weighed 0.077 gram, fibers 



still much lengthened 

 9.55 A.M. January 12, weighed 0.077 

 gram, fibers still much 

 lengthened; muscle still 

 highly irritable 

 Temperature varied between 20° and 

 21° 



Experiment 21 

 January 13, 1911 

 Sartorius of green frog 17, weighed 

 fresh 0.195 gram 



10.45 a.m. immersed in 4.34 per cent 

 dextrose; went immedi- 

 ately into maintained con- 

 traction 

 11.15 a.m. weighed 0.188 gram, con- 

 traction now less marked 

 11.45 a.m. weighed 0.184 gram 

 2.45 P.M. weighed 0.166 gram, fibers 

 somewhat shorter than at 

 11.15 and entirely unirrit- 

 able; muscle transferred 

 to Ringer 

 3.10 P.M. muscle now quite irritable 

 4.00 P.M. muscle somewhat more irrit- 

 able than at 3.10 

 Temperature varied between 20° and 

 21° 



Experiment 20 

 January 11, 1911 

 Portion of stomach muscle of leopard 

 frog 16, weighed fresh 0.074 gram 

 11.20 A.M. immersed in Ringer at 1° 

 12.20 P.M. weighed 0.079 gram, fibers 



somewhat shortened 

 3.20 P.M. weighed 0.081 gram, fibers 



still shortened 

 5.20 P.M. weighed 0.082 gram, fibers 

 still shortened 

 Temperature of Ringer up to this 

 point varied between 0° and 1° 

 10.00 A.M. January 12, weighed 0.088 

 gram, fibers slightly longer 

 than at last weighing, and 

 still highly irritable 

 From 5.20 p.m., January 11, to 10.00 

 A.M., January 12, temperature of Ringer 

 varied between 0° and 8° 



Experiment 22 

 January 13, 1911 

 Portion of stomach muscle of green 

 frog 17, weighed fresh 0.248 gram 

 10.55 A.M. immersed in 4.34 per cent 



dextrose 

 11.10 A.M. fibers shortened 

 11.25 A.M. weighed 0.277 gram, fibers 

 have become slightly 

 longer 

 11.55 A.M. weighed 0.294 gram, fibers 

 now decidedly lengthened 

 2.55 P.M. weighed 0.288 gram, fibers 



still lengthened 

 3.15 P.M. muscle still fairly irritable 

 Temperature in preceding part of 

 experiment varied between 20° and 21° 

 At 3.55 P.M. a piece of this stomach 

 muscle was cut off and weighed 0.139 

 gram. It was left in the dextrose solu- 

 tion at between 20° and 22° until 10.35 

 A.M. January 14, when it weighed 0.116 

 gram. Its fibers were rather shorter 

 than at last weighing and still slightly 

 irritable. Transfer to Ringer did not 

 increase their irritability. 



