In a second experiment, the dog made use of weighed at the beginning 11.97 kilograms. During the first five months, the average intake of nitrogen amounted daily to 0.29 gram per kilo, while the average fuel value of the food (meat, fat, and sugar) was 76 calories per kilo daily. In the middle of the seventh month the animal was quite ill, with poor appetite, vomiting, etc. Body-weight began to fall off, and the animal soon died. With both of these animals, the experiment ended suddenly by a sharp and short illness. Jägerroos, however, believed that both animals died from a severe case of infection, and not as the result of the diminished intake of proteid. This view was fully substantiated, in his opinion, by the evidence furnished on bacteriological and morphological examination. There was no pathological alteration and no fatty degeneration in the intestinal epithelium; nothing to indicate any connection between the lowered proteid intake and the death of the animal. To be sure, the long-continued diet poor in nitrogen might have diminished the power of resistance of the body, but no proof of this is offered. There was indicated merely a simple infection, as shown by the presence of Streptococcus and Bacterium coli communis in the blood. But, as Jägerroos states, one might well conceive of a lowered power of resistance on the part of the body, due not to any change in diet, but to the long-continued confinement in a cage with the enforced inactivity and lack of freedom. It is to be noted, furthermore, that here there was no sign of a gradual and progressive weakening of the body, no indication of any disturbance of the digestive tract with diminished power of absorption of either fat or proteid. On the contrary, there was a sudden and sharp attack of some infectious disease by which the animals quickly succumbed. Jägerroos was of the opinion that in the absence of this infection the animals would have continued to live for a long period of time.