984. REPORT OF THE CHEMIST OF THE 
As with the dung, calculating these figures for animals weighing 
1,000 pounds, we have for comparison the pounds of urine per 
day, as follows: 




__Poxtod. 
ese Il. 
SPOTL Hole KES ein, thevelaicayals dtata sce Sie ei Ce eae eens ane 19.3 oy ga 
FAIRIES eA 1) i 16.8 116.3 
PVONE Oe ice UL IR aa Rann ae Ba ene ana 18.0 16.7 
The average per cent of nitrogen for each period was as below: 
Period. Per cent. 
De hokey eee kik live al beim agite el bly se abide a el ae ae a nee 0.63 
Da ates wins eystece'e at uate ial ats. \s ble acelas late Weel ay bi cna eran scree ot ce 0.59 
_—_——_-_ —_——- 
We may now, from the previous data, calculate the total amount » 
of nitrogen contained in the urine, as follows: 
Period. 
oy ee ae aS 
lbs. lbs. 
EE/CS CN iERE Rd on NE aE LET SA coe be MON tt tae spn Sy pela! 0.103 0.101 
or OO ley so ee EN. ech tn Na ea Tee ay 10.340 10.1383 

The amount of nitrogen in the urine during the first period was 
almost exactly that contained in the dung, but for the second 
period there was nearly five pounds more in the dung than in the 
urine for the same time (100 days).. The large amount of chemical 
work necessary to be accomplished in connection with this exper- 
iment at the time prevented our making further examination of the 
urine. Enough is given to show the large loss resulting from the 
neglect to save the urine of our animals, since when those animals 
were fed on hay alone the amount of nitrogen contained in the 
urine was almost as great as that in the solid dung. More than 
this, the nitrogen of the urine is all in a soluble form, while much 
of that of the dung is locked up, as it were, until the mass is 
decomposed. 
INFLUENCE OF FOOD ON MILK AND BUTTER. 
Two series of feeding experiments were made during the winter 
_ of 1887-8, in connection with other experiments, to learn some- 
thing of the influence of certain foods upon the milk and butter. — 
The first trial was a continuation of the digestion experiment with 
Jem and Meg, and later a second series was made with two native 
