566 



EDWARD B. MEIGS 



Experiment 62 

 May 23, 1911 



Portions of stomach muscle of bull- 

 frogs Nos. 45, 46, 47, 48, 49, 50, 51, 52, 

 53, 54, 55, 56, 57, 58, 59, and 60, weighed 

 fresh 5.4701 grams 



This muscle was kept for five hours, 

 30 minutes in a moist chamber at 29° 

 and then dried at between 100° and 110° 



Its final dry weight was 0.9748 gram 



Experiment 63 

 May 23, 1911 



Portions of stomach muscle of bull- 

 frogs Nos. 45, 46, 47, 48, 49, 50, 51, 52, 53, 

 54, 55, 56, 57, 58, 59, and 60, weighed 

 fresh 5.3976 grams 



This muscle was placed for five hours, 

 50 minutes in 7.5 per cent cane sugar 

 solution at 29°. The sugar solution 

 was stirred and changed frequently, 

 in all about 700 cc. of it were used. The 

 muscle was still fairly irritable at the 

 end of its stay in the sugar solution and 

 weighed 6.1854 grams. It was dried at 

 between 100° and 110° and its final dry 

 weight was 1.1422 grams. 



Experiment 64 

 April 10, 1912 

 Sartorius of leopard frog 61, weighed 

 fresh 0.182 gram 

 1.00 P.M. immersed in 0.9 per cent 



KCl solution 

 1.30 P.M. weighed 0.194 gram, fibers 

 not shortened, but en- 

 tirely unirritable 

 2.00 P.M. weighed 0.216 gram 

 2.30 P.M. weighed 0.229 gram, fibers 

 rather longer than origin- 

 ally 

 3.00 P.M. weighed 0.252 gram, fibers 

 now very slightly shorter 

 than originally 

 3.30 P.M. still very slightly shorter 

 than originally and rather 

 stiff and gelatinous ; trans- 

 ferred to Ringer 

 4.10 still entirely unirritable 

 11.15 A.M. April 11, weighed 0.223 gram, 

 now quite irritable 

 through whole extent 

 Temperature varied between 18° and 

 19° 



Experiment 65 

 April 10, 1912 

 Portion of stomach muscle of leopard 

 frog 61, weighed fresh 0.161 gram 

 1.10 P.M. immersed in 0.9 per cent 



KCl solution 

 1.40 P.M. weighed 0.156 gram, fibers 



little changed in length 

 2.10 P.M. weighed 0.158 gram, fibers 



slightly shortened 

 2.40 P.M. weighed 0.162 gram, fibers 



still slightly shortened 

 3.10 P.M. weighed 0.165 gram, fibers 



still slightly shortened 

 3.40 P.M. muscle still highly irritable 

 11.25 A.M. April 11, weighed 0.234 gram, 

 fibers now considerably 

 lengthened and still fairly 

 irritable 

 Temperature varied between 18° and 

 19° 



