. Diseases of infancy and childhood . breast-milk shows that in ahundred parts there are:— Sohds Liquids Of the solid constituents there are:— Casein to Albumin Fat to Milk-sugar to Ash to BREAST-MILK. 79 TJio above is the cliemical exaniination of a good average breast-milk;I again call attention to the fact, however, that not only does the milk varyin different women, but it also varies in the same woman during one singlenursing act. The albuminoids of milk consist of real casein, lactalbumin, globulin,and opalisin. This latter body has only
. Diseases of infancy and childhood . breast-milk shows that in ahundred parts there are:— Sohds Liquids Of the solid constituents there are:— Casein to Albumin Fat to Milk-sugar to Ash to BREAST-MILK. 79 TJio above is the cliemical exaniination of a good average breast-milk;I again call attention to the fact, however, that not only does the milk varyin different women, but it also varies in the same woman during one singlenursing act. The albuminoids of milk consist of real casein, lactalbumin, globulin,and opalisin. This latter body has only recently been discovered by , and more recently by Schlossmann. Phosphorus exists in milk as nuclein-phosphorus. Wittmaack hasdemonstrated the fact that the phosphorus in womans milk exists as anorganic nitrogen compound in the casein. According to the examination of Stolasa, lecithin contains a largerquantity of phosphorus in womans milk than in cows milk. The specific gravity of breast-milk varies from 1026 to Fig. 26.—Heerens Pioscop, for Optical Milk Test. The Mammary Glands.—The mammary glands of the same womanmay yield somewhat different milk, as shown by Sourdat and later byBrunner. Also the different portions of milk from the same milking mayhave different compositions. The first portions are always poorer in fat(Parmentier, Peligot, and others). According to IHeritier Yernois and Becquerel, the milk of blondescontains less casein than that of brunettes: a difference which Tolmatscheffcould not substantiate. Women of weak constitutions yield a milk richer insolids, especially in casein, than women with strong constitutions. According to Vernois and Becquerel, the age of the woman has an effecton the composition of the milk, so that we find a greater quantity of proteinand fat in women 15 to 20 years old and a smaller quantity of sugar. Thesmallest quantity of protein and the greatest quantity of sugar are foundat 20 or from 25 to 30 years of a
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