INFLUENCE OF THE PLANE OF NUTRITION UPON MILK 69 
At the end of thirty days’ underfeeding the saponification 
number was 222:1; after fourteen days on a normal ration it 
was 225.7. During the same interval the iodin number de- 
creased from 42.62 to 34.15; the Reichert-Meissl increased 
from 21.43 to 24.2, and the melting point declined from 
36.35 to 33.60. 
A summary of the results of twenty-three experiments is 
given in Table VI. The plane of nutrition as indicated in 
percentage is calculated on the basis of the requirements of 
the animal in question calculated according to the Armsby 
Feeding Standard. : 
The data presented in Table VI have several striking feat- 
ures. The most striking is the fact that without exception all 
TABLE VI 
VARIATION IN FAT CONSTANTS FROM NORMAL TO ABNORMAL DUE TO 
PLANE OF NUIRITION 
Variations from Normal of 
Plane of |— 
Exp. Cow nutrition Saponi- Reichert- Iodin Melting 
fieation Meissl value point 
value number 
Per cent ae 
20 —62 — 7.2 —5.5 +12.4 +3.5 
206 —60 foe eee —9.9 + 8.0 +7.0 
301 —39 —15.2 —1.5 +17.5 +2.2 
300 —-38 — 3.3 —2.6 + 1.3 +2.2 
2 —23 — 5.4 —2.9 + 4.2 +0.3 
301 —16 — 4.4 —4.5 + 1.0 +0.8 
2 —33 —12.2 —6.9 414.9 +0.7 
361 —25 — 79 —4.1 +10.8 —0.8 
20 —23 — 2.0 —2.0 + 4.5 +0.0 
206 —20 — 2.3 —1.9 + 2.7 0.1 
62 AS — 5.8 —1.3 +13.3 —5.0 
—30 — 6.7 —3.7 + 7.3 +1.5 
300 —21 —10.5 —4.1 +11.6 —2.7 
300 —18 — 4.7 4.0 + 6.9 +¢.1 
301 —17 —4.1 —3.3 + 5.0 —2.4 
300 | —4 — 8.2 —3.2 +10.8 —1.2 
DO oie see asbatendeduensgs 301 | +18 to —1.5 — 6.9 —5.0 +°7<.5 —1.0 
300 — 9.4 —3.2 + 4.1 —0.2 
DOG» Naar ece vals sulin dys setae aie. —4.9 +11.0 +3.5 
209 —14.0 —7.0 + 6.3 +6.0 
211 —13.8 —&8.2 + 5.8 +8.5 
407 — 3.7 —3.3 + 4.5 +2.7 
305 — 5.2 —2.0 + 5.2 —1.2 
* Subnormal. 
