Aol UDY OF RATIONS FED TO MILCH COWS. A7 
from day to day, and-by determining their composition by chem- 
ical analysis. ‘The factors used for calculating the quantities of 
digestible nutrients are the chief sources of uncertainty here, but 
this uncertainty is at present inevitable. 
In Germany there is a tendency to the more liberal use of 
protein. The ration proposed by the Wisconsin Station advocates 
less protein and more of the fuel ingredients of the food. Because 
carbohydrates and fats are so abundant and so cheap in this country 
that we feed them liberally does not imply, much less prove, that 
we are using them wisely. 
Widews. Narrow Rations. 
RESULTS OF TESTS IN 1892-93. 
There are so few American data upon the effects of rations, 
that the teachings of the studies of the herds made by the 
Station upon this question are of some value. 
Summary of rations fed and ytelds of butter obtained from sixteen 
herds examined tn 1592-93. The ytelds of butter are classified 
in accordance with the nutritive ratios of the ration and 
the amounts of digestible protein which they contain. 

















SUMMARY OF RATIONS FED PER HEAD. DAILY AVERAGE YIELDS OF 
BUTTER* PER Cow. 
= = fs Nutritive Digestible 
2 = & = Fi = Ratio. Protein. 
Se | fe <a Oe weit 
Herd S pai 2a w tee Oo each ee ee | ee 
No Combe ae sea ee ha ol ea Say tea PS ct aes 
Bases] | 82 [Hel lye sige sieve we 
v ne) o0 3 == SON eee en = ais Zin 2 
ie oe 2h eG SS Siem) fos 
O 4 
Bebsar't ibs. ) Lbs. I: Cal. Lbs. il bs.ai bs. iia lebs: 
I, - - GOOn i 2250 | 2.25 6.0. | 30,100 ) — Lek phos — 
2,6 - Scowmesi<os | 2.24) 110.0. 1220,6007) | == £0 1.0 a 
3, - - SOOM E2E. 5's). 2:40 5.5 | 30;950) — 152 2 —- 
hee = BOO 125.00)" 2.08" 7.0. 131 850ck 40.8 — 0.8 — 
5, - - BOO ete a.7 2:52 5.5 |-31,500| — 10 1.0 — 
6, - - OOM 23:0" | “1.85 S. OSV 35 05000 0.6 — — 0.9 
7. ~ - 800 |} 25.6] 1.96 25. 347100 I.I ive — 
8, - - awe 20, 9) 2:33°). 6.6.5 30,000.) 2— 1.0 1.0 — 
9, - ean g00" | 20.5 | 1.93 | 6.5°./ 26,950) *0.9 — —- 0.9 
10, - - Sen 20,7. | 1.95 Ois4 27-3000 es Ie2 -- tee — 
aT: = - Sonmiesieay) 2:27 5.5 | 28,400| — 0.9 0.9 —_ 
12, - - Samim zOes ©) 2,02. lor 4.6 26,900 7 — nies) L.3 — 
13, - - BOO 10.4 | 1.76 | 0.0 |23,000 0.8 — 0.8 
14, - - Bieee22s0 1223218 0.0 1 20,550.10 == tt Do — 
15, - - BEOME ZO) 20 | SI. 15+ 11s) bl, 250"19 40.5 — — 0.8 
16, - - GOCE 2025. | 1,30; ;, 9.51. 20,050 | 0.9 se — 0.9 
Average, Sica oa.0) 92:06 40,001 29,000 (20.9) 1.01) Llc). 0.8 








* Butter assumed to contain 85 per cent. of butter-fat. 
+ More or less than 2.2 lbs. fer 7,000 lbs., live weight. 
