August 23, found dead. _Autopsy_: Liver greatly engorged; stomach fairly well distended and mucous membrane in a slightly inflammatory condition; contents of small intestine liquid in nature, but walls of same appeared normal; other organs normal in appearance. _Rabbit 396. Belgian hare, female. Weight, 1,475 grams. Diet, oats._ August 18: 1 p. m., 20 cc 2 per cent caffein (272 mg per kilo) injected subcutaneously in the back; 4 p. m., reflexes increased markedly; 5 p. m., reflexes increased markedly but no tetanus. August 19: 10.30 a. m., reflexes still increased very markedly; rabbit jumps when touched. August 21: Weight, 1,245 grams. Injected subcutaneously 275 mg of caffein per kilo; reflexes increased, posterior extremities stiff over hour later. August 22: 9 a. m., found dead. _Autopsy_: Thoracic organs normal in appearance; stomach distended and mucous membrane affected with a catarrhal inflammation; contents of stomach were covered with a shiny mucus; contents of small intestine liquid in nature and bile stained; liver showed a coccidial infestation; kidneys and spleen normal in appearance. _Rabbit 397. Belgian hare, male. Weight, 1,375 grams. Diet, oats._ August 19: 10.30 a. m., 20 cc 2 per cent caffein (290 mg per kilo) injected subcutaneously in the back. August 22: 9 a. m., found dead. _Autopsy_: Stomach distended with ingesta; mucous membrane exhibited a catarrhal inflammation with excessive secretions; major portion of intestines showed a condition similar to that of stomach, contents consisting mainly of a shiny mucus; liver enlarged; other organs apparently normal. _Rabbit 398, Belgian hare, female. Weight, 1,570 grams. Diet, oats._ August 19: 10.30 a. m., 23 cc 2 per cent caffein (293 mg per kilo) injected subcutaneously in the back; 4 p. m., found dead. _Autopsy_: Thoracic organs seemingly normal; mucous membrane of stomach exhibited a catarrhal inflammation generally; large intestines somewhat impacted but walls appeared normal; other organs normal. _Rabbit 399, Belgian hare, male. Weight, 1,725 grams. Diet, oats._ August 19: 10.30 a. m., 26 cc 2 per cent caffein (300 mg per kilo) injected subcutaneously in the back; found dead at 4.30 p. m. _Autopsy_: Lungs slightly congested; liver engorged and friable; gall cyst well filled; stomach exhibited catarrhal gastritis; injection of mesenteries and intestines; kidney showed marked cortical congestion.