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HUMAN COLOSTRUM. GG5
The colostrum has a higher specific gravity, 1.040-1.060, a greater
quantity of coagulablo proteins, and a deeper yellow color than ordinary
woman’s milk. Even a few days after delivery the color becomes Leefl
yellow, the quantity of albumin less, and the Dumber of colostrum-cor-
puscles diminishes.
We have the older analyses of Clemm 1
and the recent investigations
of Pfeiffer, V. and J. Adriance, Camerer and Soldner on the changes
in the composition of milk after delivery. It follows, as a unanimous
result from these investigations, that the quantity of protein, which
amounts to more the first two days, sometimes to more than 30 p. m.
at first, rather qu’ckly and then more generally diminishes as long as the
lactation continues, so that in the third week it equals about 10-18 p. m.
Like the protein substances, the mineral bodies also gradually decrease.
The quantity of fat shows no regular or constant variation during lacta-
tion, while the lactose, especially according to the observations of V.
and J. Adriance (120 analyses), increases rather quickly the first days
and then only slowly until the end of lactation. The analyses of Pfeiffer,
( amerer and Soldner also show an increase in the quantity of milk-sugar.
The two mammary glands of the same woman may yield somewhat different
milk, as shown by Sourdat and later by Brunner. 2
Likewise the different
portions of milk from the same milking may have varying composition. The
first portions are always poorer in fat.
According to l’Heritier and to Vernois and Becquerel, the milk of blondes
contains less casein than that of brunettes, a difference which Tolmatscheff 3
could not substantiate. Women of delicate constitutions yield a milk richer in
solids, especially in casein, than women with strong constitutions (V. and B.).
According to Vernois and Becquerel, the age of the woman has an effect on
the composition of the milk, so that we find a greater quantity of proteins and
fat in women 15-20 years old and a smaller quantity of sugar. The smallest
quantity of proteins and the greatest quantity of sugar are found at 20 or from
25 to 30 years of age. Vernois and Becquerel, consider that the milk with the
first-born is richer in water—with a proportionate diminution of casein, sugar,
and fat—than after several deliveries.
The influence of menstruation seems to diminish slightly the milk-sugar and
to increase considerably the fat and casein (Vernois and Becquerel).
Witch’s milk is the secretion of the mammary glands of new-born children
of both sexes immediately after birth. This secretion has from a qualitative
standpoint the same constitution as milk, but may show important differences and
variations from a quantitative point of view. Schlossberger and Hauff,
Gubler and Quevenne, and v. Genser, 4
have made analyses of this milk and
give the following results: 10.5-28 p. m. proteins, 8.2-14.6 p. m. fat, and 9-60
p. m. sugar.
1
See Hoppe-Seyler, Physiol. Chem., 734.
2
Sourdat, Compt. Rend., 71; Brunner, Pfluger’s Arch., 7.
8
l’Heritier, cited from Hoppe-Seyler, Physiol. Chem., 738; Vernois and Becquerel,
Du lait chez la fen.n.e dans l’etat de sante, etc., (Paris, 1853); Tolmatscheff, Hoppe-
Seyler, Med.-chem. Untersuch., 272.
4
Schlossberger and Hauff, Annal. d. Chem., u. Pharm., 96; Gubler and Quevenne,
cited from Hoppe-Seyler’s Physiol. Chem., 723; v. Genser, ibid.
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