[20] Flint's "Physiology."
[21] It is possible that albumen and fibrin are acted upon by some of the juices secreted in the mouth.
[22] The body loses each day, in the performance of its ordinary and usual functions, about nine pounds of matter (Martin); therefore, that amount of income of food, water, and air will be needed in every twenty-four hours.
[23] Prof. Atwater, in "The Century Magazine," 1887–88.
[24] Hemoglobin, the red coloring matter of the blood, contains albumen.
[25] Protein may be converted into fat; but although this will happen, it will not do to depend upon it for the supply in the nutrition of the body; for either it cannot be formed in sufficient quantity, or the excess of nitrogen acts as a poison. The body suffers unless a due amount of fat as such be taken. (Martin.)
[26] By regulating the amount of fat taken each day with food, so that a little less than is needed is consumed, one may reduce the amount of fat of the body and become thin, or reduce an excess of fat without injury to health. The process must be gradual, and continued for a number of months. Bismarck, by the advice of his physician, reduced himself in this way without loss of energy or any ill feeling.
[27] Flint's "Physiology."
[28] Parkes.
[29] Martin.