February 13: 1 p. m., still alive.
February 14: 9 a. m., found dead.
Guinea pig 45. Female. Weight, 435 grams. Diet, oats for about one month previous to injection.
March 17: 3 p. m., 3.5 cc of 2 per cent caffein injected subcutaneously in the back (0.160 gram per kilo); 4.35 p. m., no symptoms; 5.40 p m., no symptoms.
Guinea pig 39. Male. Weight, 820 grams. Diet, oats and carrots.
February 12: 11 a. m., 6 cc (0.15 gram per kilo) 2 per cent caffein injected subcutaneously in back.
February 14: 9 a. m., alive; seemed to be in good condition; found dead at 1 p. m.
Guinea pig 41. Weight, 660 grams. Diet, oats and carrots one week previous to injection.
February 12: 11 a. m., 5 cc (0.15 gram per kilo) 2 per cent caffein injected subcutaneously.
February 14: 2 p. m., pig alive; apparently normal.