16 



Fertilizing Constituents of Salt Hay. (per cent with natural 



moisture.) 



English. Black. Fox. Branch. Red. Cove. Salt. Sage. 



Phosphoric acid, .29 .,-^ .18 .18 — — — .31 



Potash, 1.50 ■— .92 .85 — — — 1.10 



Nitrogen, 1 00 1^' 1.20 1.00 — — — 1.00 



Salt percentages, .72 3.71 2.46 3.18 — 



— 3.91 



D. Digestibility. 



Each of these seven samples was fed to three sheep, to determine 

 the amounts of the several ii'gredients these animals were capable of 

 digesting (i. e. turning into nourisliment). Repeated experiments 

 have proved that sheep, cows, oxen, etc. digest about equal quanti- 

 ties of different feed stuffs. Each sheep was fed 400 grammes of 

 English hay, and 5(i0 grammes salt hay daily. (1 pound^45o.6 

 grammes) Knowing the digestibility of tlie English hay, the diges- 

 tibility of the salt hay was calculated. Here follow the digestion 

 percentages or coefficients of the several ingredients in each of the 

 hays. 7^ 



DIGESTION COEFFICIENTS. 



Using these determined percentages, we calculated the following 

 amounts of each of the several ingredients digestible in one ton, on 

 the basis of the natural moisture. 



