INFLUENCE OF STAGE OF LACTATION. 129 
TRUST, CALVED NOVEMBER 12, 1901. 
TABLE LI.—Giving Weights, Nutrients Consumed and Products Yielded from 
Ist-llth Week of Lactation. 















NUTRIENTS DAILY PRODUCT YIELDED Aue 
WEEK WEIGHT 
fee ere) eee mie | Soe eee rees 
ist 925 1.408 | 8 61 42 30.98 | 1.452 | 4.455 | 2.22 12 
2nd 875 1.899 | 9.69 sos 39.97 | 1.817 | 5.484 | 2.90 .96 
3rd 825 1.814 8.84 47 35.41 | 1.750 | 4.866 | 2.68 .96 
4th 802 1.814 | 8.84 47 30.91 | 1.708 | 4.411 |] 2.85 | 1.10 
5th 797 1.846 | 9.20 47 ‘32.00 | 1.558 | 4.342)) 3.40 | 1.22 
6th 795 1.878 | 9.55 47 32.87 | 1.573 | 4.444] 3.62 128 
7th 785 1.977 | 10 62 52 33.50 | 1.544 | 4.208 | 4.57 158 
Sth 785 OT 7 [LOG 2 52 32.72 | 1.531 | 4.415 | 4:57 1.58 
9th 795 2.015 | 11.05 53 33.77 |1.487 | 4,272 | 4.97 eis 
10th 785 2 Oo AlcOS OS 32.76 | 1.610 | 4.439 | 4.64 1.68 
11th 785 ZALVA | 12121 Ox 32.16 | 1.377 | 4 075 | 6.30 2.12 
Average... 814 LSet | LOLOL: .50 33.37 | 1.591 | 4.494: | 3°79 1.34 






At the beginning of her lactation the cow weighed 925 
pounds and during the week sheshrank 50 pounds in weight. 
She consumed daily of protein 1.408 pounds, of carbohy- 
drates 8.61 pounds, and ether extract .42 of a pound. She 
gave 30.98 pounds of milk, 1.452 of butter fat and 4.455 
pounds of milk solids and returned a pound of butter fat to 
2.22 pounds of net nutrients and a pound of milk solids to 
.72 of a pound, that is, she returned more product than there 
was of available nutrients, and it therefore follows that she 
applied some of the substances she had stored in her body 
either for maintenance or for product. By further examin- 
ing the table it is seen that as her weight decreased the nutri- 
ents required to a pound of product increased, and that as 
her weight decreased, her daily consumption of nutrients in- 
creased until by the eleventh week,when she had reached her 
normal working weight, 785 pounds, she took 2.114 of pro- 
tein, 12.11 of carbohydrates, and .57 of ether extract, and 
gave 32.16 pounds of milk, 1.374 of butter fat and 4.075 of 
milk solids. By the eleventh week she had practically estab- 
