Experimental researches on the food of animals, and the fattening of cattle by Thomson Robert Dundas 1810-1864

Author:Thomson, Robert Dundas, 1810-1864. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Feeds, Cattle
Publisher: New York, A. O. Moore
Published: 1858-03-25T05:00:00+00:00

Water 87*40

Soluble salts 017

Insoluble salts 042 Butter ^

Sugar > 12-01 Casein J

In several determinations the water in the milk of both cows was never found to vary more than a few tenths when prooerly dried.

In comparing this experiment with the preceding, by examining the proximate tables, (Table I. Appendix,) we find that while 100 lbs. of dry grass produce about 11^ lbs. of dry milk, 100 lbs. of dry grass and entire barley mixed produce 8| lbs. of dry milk. Grass alone produces a larger quantity of dung than mixed barley and grass fodder ; 100 lbs. of grass leaving 33J lbs. of dung, while barley and grass produce only 30 lbs. of dung; but 100 lbs. of the grass consumed, that is, the grass taken into the circulation of the animal, and not rejected in the form of dung, produces 17| lbs. of dry milk, while 100 lbs. of the mixed barley and grass diet form only 12 lbs. of dry milk. This may proceed from the circumstance that more solid matter was actually contained in the grass than in the equivalent of barley employed; but the cause becomes not so obvious when we consider that a portion of the barley was rejected entire along with the dung. The more probable explanation of the apparent anomaly may be, that the dung varies slightly in its composition ; the small difference of 3| lbs. may be owing to this source of error in the calculation. Another important deduction from these two experiments in reference to economy is, that the total quantity of matter taken into the

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