October 1: 9.45 a. m., 4 cc, 2 per cent caffein (163 mg per kilo), injected into peritoneal cavity; 4.30 p. m., no symptoms developed since injection.
October 3: 2 p. m., alive.
October 8: Found dead. Autopsy: Congestion of lungs, spleen, liver, kidneys, and small intestines.
Series C.
Guinea pig 59. Gray and white. Weight, 375 grams. Diet, oats.
October 3: 2 p. m., 3.75 cc (0.2 gram per kilo) injected into peritoneal cavity; 2.15 p. m., reflexes increased but not markedly; 4 p. m., reflexes still more increased; no other symptoms; 5.30 p. m., no symptoms.
October 4: 8.50 a. m., guinea pig alive and active.
Guinea pig 58. Brown and white. Weight, 380 grams. Diet, oats.
October 3: 2 p. m., 3.8 cc caffein (0.2 gram per kilo), 2 per cent solution, injected into peritoneal cavity; 2.10 p. m., hind legs extended, then tetanus; attack lasted a few seconds, after which pig raised himself on his legs, but reflexes remained much exaggerated; 4 p. m. to 5.30 p. m., no symptoms of caffein intoxication.
October 4: 8.50 a. m., guinea pig alive and active.