. American journal of pharmacy. nd the butter-fat content of a milk directly asthe bases for sorting out skimmed, watered, and sub-standard method is for preliminary use in routine examinations of so-called herd milks or market milks. It is logical that the lactometerreading and the percentage of fat should ser^-e directly to guide the *Read before the Delaware County Institute of Science, Media, Pa., May9, 192 T. m-^ 8i8 Lactometer and Fat in Milk Control. {^Vecri92^^ later detailed work because these are the values determined at theoutset in routine milk work. In States that, like
. American journal of pharmacy. nd the butter-fat content of a milk directly asthe bases for sorting out skimmed, watered, and sub-standard method is for preliminary use in routine examinations of so-called herd milks or market milks. It is logical that the lactometerreading and the percentage of fat should ser^-e directly to guide the *Read before the Delaware County Institute of Science, Media, Pa., May9, 192 T. m-^ 8i8 Lactometer and Fat in Milk Control. {^Vecri92^^ later detailed work because these are the values determined at theoutset in routine milk work. In States that, like Pennsylvania, have expressed in the stat-utes minimum legal percentages of fat and total solids, and thatdo not provide additional penalties for skimming and watering,-the analyst does well to confine his evidence to data showing themilk in question to be sub-standard. It is worth while in such that a suspected milk is skimmed or watered only inthose cases where the percentages of fat and of total solids are. above the legal minima. The method suggested in this paper em-bodies this idea. In normal mixed n^ilks the constituents are present in fairlyconstant proportions. The relations between various constituentshave found expression in numerous milk formula: ^ some of which ^ Milk and Cream Act, approved June 8, 1911, forbids the sale of milkwhich contains less than three and one-quarter (3%) per centum of butter-fat, and less than twelve (12) per centum of milk solids, etc. In the State of Massachusetts, the penalty for the sale of milk which isadulterated is more severe than for the sale of milk below the legal , Jour. Ind. Hug. Chcm., VI, p. 900, 1914. See also, Journ. Off. , August, 1921. ^ These may be found in various text-books Among tiie more valuableof the recent formulse are those due to Lythgoe (footnote 2) resting upon thetotal solids, the sugar, the fat and the ash, which may be used in distinguishing ^DecriS.^ \ Lacto
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