INFLUENCE OF STAGE OF LACTATION. 141 
turned to net nutriment available for product by the cow 
Trust, the following table is given showing the daily aver- 
age consumption of total nutriment during each week for 11 
consecutive weeks, the nutriment needed daily for mainte- 
nance,that available for product, total product yielded daily 
and nutriment to one pound of product. The fotal nutriment 
consumed daily is obtained by multiplying the ether extract 
taken daily by 2.4 and adding the product to the digestible 
protein and carbohydrates taken daily; and the ‘otal pro- 
duct yielded by multiplying the butter fat yielded by 2.5 and 
adding the product to the milk solids not fat yielded daily. 
While butter fat may have a uniform energy value, cows 
differ with reference to the per cent fat yielded to solids not 
fat, and so even total solids cannot be employed as a cor- 
rect measure of product yielded. It is for this reason that 
an attempt is made to reduce the two products, solids fat 
and solids not fat, to a common energy value by the method 
stated. 
TABLE LXI.—Showing Disposition Made of Nutriment Consumed by Trust 
During a Period of 77 Days. 













ae Total Nutriment Nutriment Total per Oi Neus 
eel ne. | Dos. [pmentera 
¥ a OoUS an Product 
1st 11.026 4.215 3.811 6.633 7 
2nd 12.813 6.525 6.388 8.209 SLT 
3rd 11.782 6.455 5.327 7.A9L s7jal 
4th 11.782 6.256 5.526 5.973 92 
Sth 12.174 6.217 5.957 6.679 .89 
6th 12.556 6.201 6.355 6.803 .93 
7th 13.845 6.123 T.T22, 6.524 1.08 
8th 13.845 6.123 TE (Sevalal 1.15 
Sth 14.337 6.201 8.136 6.502 1.25 
10th 14 337 6.123 8.214 6.854 1.19 
11th 15.592 . 6.123 9.469 6.140 1.54 
Average... 6.788 6.774 1.00 



Special attention is invited to the gradual increase from 
week to week of the amount of nutriment consumed daily as 
the period of lactation advanced, except the second week, 
