It is perfectly plain from these results that there was no falling off in the utilization of fat; the percentage amount digested and absorbed, as in dogs 3 and 4, was just as large at the end of the twelve months’ experiment as at the beginning. Clearly, a so-called low nitrogen intake with dogs does not lead to any loss of power in the utilization of the fat of the food. This being so, it is equally clear that the arguments based on Munk’s results in this direction, and applied to man, are without adequate foundation. UTILIZATION OF NITROGEN IN PERCENTAGES. +----------+-------------------------------------------------+ | | Dogs. | | Periods. +----+----+----+----+----+----+----+----+----+----+ | | 1 | 2 | 3 | 4 | 5 | 12 | 13 | 15 | 17 | 20 | +----------+----+----+----+----+----+----+----+----+----+----+ | 1 | 95 | 91 | 92 | 94 | 91 | 91 | 90 | 93 | 92 | 91 | | 2 | 92 | 94 | 94 | 95 | 93 | 90 | 92 | 96 | 92 | 87 | | 3 | 91 | 92 | 90 | 91 | 88 | 89 | 86 | 95 | 89 | 91 | | 4 | 90 | 85 | 90 | 92 | 91 | 82 | 83 | 91 | 83 | 93 | | 5 | 90 | 82 | 88 | 92 | 86 | 85 | 84 | 96 | 91 | 90 | | 6 | 86 | 87 | 89 | 83 | 86 | 89 | 87 | 94 | 91 | 86 | | 7 | 87 | 87 | 90 | 83 | 87 | 83 | 88 | 90 | 93 | 91 | | 8 | .. | .. | 90 | 83 | 84 | 81 | 89 | 89 | .. | .. | | 9 | .. | .. | 89 | 87 | 92 | .. | 87 | 89 | .. | .. | | 10 | .. | .. | 93 | 85 | 94 | .. | .. | .. | .. | .. | | 11 | .. | .. | 93 | 81 | 86 | .. | .. | .. | .. | .. | | 12 | .. | .. | 89 | 92 | .. | .. | .. | .. | .. | .. | +----------+----+----+----+----+----+----+----+----+----+----+