Investigations Concerning the Horse. 



277 



fodders, is of no value to the horse either for maintenance or for 

 production of work, the decomposition of cellulose taking place in 

 the colon through the action of ferments, after it has passed the 

 digestive tract. For keeping a horse of 1,100 pounds weight at 

 maintenance, 9.25 pounds of digestible matter are required in the 

 ration, as has been seen. Of crude fiber-free nutrients, 7.28 to 

 7,50 pounds were found necessary, an av^erage of 7.39 pounds. 

 This result is an average of thirty-eight experiments with three 

 horses and agrees closely with the findings of Grandeau and 

 Leclerc, who obtained 7.47 pounds as the average of six closely 

 agreeing experiments with two horses. 



436. Work possible from one pound of feed. — Beyond the 7.39 

 pounds of digestible crude fiber-free nutrients required for the 

 maintenance of a 1,100 pound horse, each additional .22 of a pound 

 (100 grams) of the crude fiber-free digestible nutrients will, ac- 

 cording to Wolff, increase the power of the horse for muscular 

 work about 400,000 foot-pounds. The table presented below 

 shows the total available work possible from one pound of com- 

 mon feeding stuff on this basis: 



WorTc, in foot-pounds, obtainable from one pound of various food 

 substances when fed to the horse — Wolff. 



Feed. 



No. of 



anal 



yses, 



No. of 

 diges- 

 tion ex- 

 peri- 

 ments. 



Total 

 digesti- 

 ble or- 

 ganic 

 matter. 



Digesti- 

 ble 

 crude 

 liber. 



Equivalent to work. 



Crude 

 fiber in- 

 cluded. 



Crude 

 fiber ex- 

 cluded. 



Meadow hay 

 Clover hay... 

 Alfalfa hay... 

 Wheat straw 



Oats 



Barley 



Corn 



Field beans .. 



Peas 



Lupines 



Linseed cake 



Flaxseed 



Potatoes 



Carrots , 



Per et, 



40.6 

 41.1 

 46.2 

 15.7 

 60.2 

 70.7 

 80.0 

 72.4 

 66.7 

 63.4 

 63.4 

 74.0 

 21.5 

 6.0 



Per ct. 



11.4 

 12.0 

 11.0 

 7.6 

 2.0 

 4.1 

 1.6 

 4.5 

 0.5 

 8.7 



Foot- 

 pounds. 



,500 

 ,600 

 ,100 

 ,800 

 ,000 

 ,000 

 ,000 

 ,000 

 ,000 

 ,000 

 ,000 

 ,000 

 ,000 

 ,800 



736 

 74.5 

 838 

 284 

 ,092 

 ,282 

 ,452 

 ,313 

 ,210 

 ,150 

 ,150 

 ,343 

 390 

 108 



Foot- 

 pounds. 



529,800 



527,900 



638.600 



147.000 



1,055,000 



1,209,000 



1,424,000 



1,232,000 



1,201,000 



992,400 



1,150,000 



1,343,000 



390,000 



108,800 



