. 
During the gaining periods we observed that as the water consumed 
diminishes less albuminoid is required, a result in general correspond- 
ing to those obtained by Henneberg. ‘The application of this remark 
to ensilage is evident: Through the less water drank when ensilage is 
fed, and the less amount of water daily consumed the albuminoid of 
the ensilage becomes of greater avail toward maintenance of weight. 
‘ In order to justify our assumption that a maintenance ration of en- 
silage was being fed, we may have recourse to the absolute method, as 
follows: 
Wiirogen consumed... 3s... .= 2% 2.2) eh => gee cus 98 -5910 Ibs. 
Nitrogen recovered in excrement ................. 3564 
Nitrogen recovered in milk ........... Snes -»ee -1833 
Total nitrogen recovered’. :. 2: 50s P27 STS PU Ree .5397 lbs. 
Nitrogen unaccounted for’. 22./ 050.001 0% A ae -0513 lbs. 
This .0513 lbs. of nitrogen represents a gain in weight of the cow 
of one and one-half pounds of fiesh. 
For. studying the milk yield we bring together the following figures 
for the last three days of each period for the four cows: 
Milk Dry matter ‘Dry matter 
per day, of milk, of milk, 
PERIOD Ibs. ibs. per cent. 
Sess ete eee eee eee 55.06 8.12 14.76 
TRE wale ate eee BA eter 2d 52.42 8.01 15.28 
UTP ae Sae ene oe ees 67.27 9.23 13.73 
BV 5 5.S. caro, Sete ees eee eee 53.19 7.66 14.40 
BP ere Poe ee 48 .50 6.95 14.34 
WA. on. he Se uee ee fe aie Oe err 39.29 4.95 14.04 
WAS os Se See ee oe 45.82 6.71 14.65 
As Periods I and VII are under like feeding we have in their differ- 
ence a means of obtaining the depression in milk yield which we may 
assume to be that caused by the progress of lactation. We can hence 
construct a table of assumed normal yields for each period for com- 
parison with the actual yields, in order to obtain the gain or loss to be 
scribed to the food used. Wealso add acolumn showing the amount 
of albuminoid digested during each period, according to the German 
tables : 
Assumed normal Actual Gain Albuminoid 
milk yield, yield, orloss, digested, Nutritive 
lbs. Ibs. lbs. lbs. rati 
PERIOD. o 
Mey te clea ce Ge eos, 00.06) 4 oaiepb 067 Uh sa. 4.80 1:10.3 
sha SSA 8 ede 53.31 52.42 — 0.89 6.12 1: 7.4 
SET Nap ias 5 ok eee 52.06 67.27 +15.21 11.48 1: 4.3 
PVG Mats Be Set se 50.56 53.19 + 2.63 4.04 1:10.4 
Woe. 25u UREN, iis 48.32 48.50 + 0.18 2.48 1:12.4 
WT Distan Mintel a ie cists stahctades 46.33 32.25 —11.08 2.68 1:11.8 
LL ws see che cet ae 45.82 4583: ~°.5¢t ae 5.00 1:10.3 
We may infer from these tables the following conclusions: 
The average amount of dry matter in the milk is one pound to 6.91 
pounds of milk ; the variation during the seven periods from this aver- — 
age is but .57 pounds, or about five per cent either way from the aver- 
age. ‘This indicates that the average composition of the total milkfor — 
the day is nearly unaffected by the changes in the fodder, although the — 
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112 [ASSEMBLY _ 











