. Cyclopedia of farm animals. Domestic animals; Animal products. Fig. 67. The '' marbling '' of meat. Zuntz and Hagemann, after correcting what they regard as errors in Wolff's method of calcula- tion, compute the average maintenance requirement from his experiments as pounds digestible mat- ter per 500 kilograms live weight, this including the crude fiber. From one of their own experiments with a ration containing less crude fiber they obtain a requirement of pounds. These amounts are equivalent, respectively, to 14,950 Cals. and 12,930 Cals. of fuel value, the greater amount being
. Cyclopedia of farm animals. Domestic animals; Animal products. Fig. 67. The '' marbling '' of meat. Zuntz and Hagemann, after correcting what they regard as errors in Wolff's method of calcula- tion, compute the average maintenance requirement from his experiments as pounds digestible mat- ter per 500 kilograms live weight, this including the crude fiber. From one of their own experiments with a ration containing less crude fiber they obtain a requirement of pounds. These amounts are equivalent, respectively, to 14,950 Cals. and 12,930 Cals. of fuel value, the greater amount being re- quired with the coarser and more woody food. Com- puting the work of digestion and assimilation according to their method, and subtracting it from the fuel value of the ration, they find the amount of available energy to be very nearly the same in the two cases, averaging 7,920 Cals. Accordingly, a ration containing, according to the table of "Available Energy per Pound for the Horse " (page 66) previously given, the above-named amount of available energy would be a maintenance ration for a 500-kilogram horse. Zuntz and Hagemann, however, present evidence to show that a consider- able share of this represents energy required to produce heat to maintain the temperature of the body. When the horse is doing work on a medium or heavy ration, however, it has abundance of heat from other sources, and this part of the maintenance ration is not needed. They estimate the actual demand for energy for the internal work of the body at 4,356 Cals. per 500 kilograms live weight, and make this the basis of their com- putations of rations. Meat production. By meat, in the general sense of the term, is meant the edible part of the carcass. This part is made up of the adipose tissue and of the lean meat, or meat in the narrower sense of the term. The adipose tissue, commonly .spoken of as the fat, is not pure fat, but consists of cells of connective tis- sue which have become loade
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