PHYSIOLOGICAL ACTION, AND ANTAGONISM. 
243 
Fig. 32. Action of caustic potash, 1-3000, for 43™, succeeded by action of lactic acid, 
1-1000 for 42™. 
Fig. 33. Caustic soda, 1-2500, once renewed in 25™, succeeded by action of lactic acid, 
L—500, once renewed in 25™. 
Fig. 34. Curarised gastrocnemius. Caustic soda, 1-4000, twice renewed in 33™, suc¬ 
ceeded by action of lactic acid, 1-1500, once renewed in 25™. 
Fig. 35. Curarised gastrocnemius. Caustic potash, 1-6000, thrice renewed in 46™, 
succeeded by lactic acid, 1-1500, twice renewed in 28™. 
Fig. 36. Curarised gastrocnemius. Lactic acid, 1-1000, four times renewed in 37™, 
succeeded by caustic potash, 1-2500, once renewed in 34™. 
Fig. 37. Action of caustic potash, 1-2500, twice renewed for 13™, succeeded by action 
of lactic acid (1-500) for 18™, and this by action of caustic potash for 
17-5™. 
Fig. 38. Action of caustic potash, 1-4000, for 20™, succeeded by lactic acid, 1-1000, 
48™. The muscle is subjected to maximal stimulation before the change 
of each solution. 
1. Contraction of normal muscle. 
2, 3. Contractions of alkali muscle. 
4, 5, 6, and 7. Contractions of acid muscle. 
Fig. 39. Action of potash, 1-1500, for 18™, succeeded by lactic acid, 1-500, for 24™. 
1. Contraction of normal muscle. 
2, 3, 4. Contractions of alkali muscle. 
5, 6, 7. Contractions of acid muscle. 
PLATE 10. 
Fig. 40. a. Curve of normal gastrocnemius. Direct stimulation. 
b. Ditto. After 10™ in soda solution, 1-3000. 
c. Ditto. After 20™ in ditto. 
Fig. 41. a. Curve of normal gastrocnemius. Direct stimulation. 
b. Ditto. After 15™ in lactic acid solution, 1-2500. 
c. Ditto. After 30™ in ditto. 
Fig. 42. a. Curve of normal gastrocnemius. Direct stimulation. 
b. Ditto. After 15“ in potash solution, 1-4000. 
c. Ditto. After 15“ in lactic acid solution, 1-500. 
d. Ditto. After 30“ in ditto. 
e. Ditto. After 45“ in ditto. 
2 t 2 
