364 THE NATURE AND TREATMENT OP 



microscope. No difference was perceptible in the proportion 

 of milk globules in the two specimens ; but the globules in the 

 nurse's milk were some two or riiree times the size of those of 

 the mother's. This corresponds to what some observers have 

 stated with regard to human milk — that its nutritive proper- 

 ties depend as well upon the size, as upon the number, of its 

 corpuscles." 



THE COMPOSITION OF MILK AT VARIOUS TIMES OF 

 THE DAY. 



" Professor Boedeker has analyzed the milk of a healthy cow, 

 at various times of the day, with the view of determining the 

 changes in the relative amount of its constituents. He found 

 that the solids of the evening's milk (13 per cent) exceeded 

 those of the morning's milk (10 per cent) ; while the water 

 contained in the fluid was diminished from 89 per cent to 86 

 per cent. The fatty matters gradually increase as the day 

 progresses. In the morning, they amount to 2.17 per cent, at 

 noon to 2.63 per cent, and in the evening to 5.42 per cent. 

 This fact is important in a practical point of view ; for while 

 16 ounces of morning's milk will yield nearly half an ounce 

 of butter, about double this quantity can be obtained from the 

 evening's milk. The casein is also increased in the evening's 

 milk, from 2.24 to 2.70 per cent ; but the albumen is dimin- 

 ished from 0.44 per cent to 0.31 per cent. Sugar is least 

 abundant at midnight (4.19 per cent), and most plenty at noon 

 (4.72 per cent). The percentage of the salts undergoes al- 

 most no change at any time of the day." — Henle's Zeitschr.fur 

 Mationelle Medicin. — Edinburgh Medical Journal. 



MILK WHICH DOES NOT YIELD BUTTER, AND THE 

 REMEDY. 



The author's attention was lately called to a couple of native 

 cows, aged five and six years, the property of Mr. H., West 

 Roxbury. The animals appeared to be in the very best con- 

 dition ; had good appetites, and remasticated their food ; in 

 fact, I could not perceive any thing about the animals that 



