etal 
No. 33.] 39. 
and VY, indicate a low value for potatoes when fed in the quantities 
indicated. ‘The potatoes, indeed, seem to have a diuretic effect, as 
is indicated by the following table, calculated for each full period 
and which will be more accurately given in succeeding tables founded » 
upon observations of the four days while under the full influence of 
the food used. 
Excrement passed, pounds per cow: 

Periods, 
L I. tis ory eee 
Dung and urine ........ 47.82 48.65 (48.138 51.78 60.30 
yy. excrement’... 5... 5.94 5.35 6.33 8.76 7.33 
Water in excrement.... 41.88 43.30 36.80 48.02 52.97 
The influence of these rations upon the milk can be shown in 
tabular form, based on fourteen analyses during Period I, thirty-six 
during Period II, seventeen during Period III, twenty-eight during 
Period IV, and nineteen during Period V. 
Average daily milk yield per cow in pounds: 
Periods. 
ee Ti ae 
Pievumaner or milk. 0. 271 2.7 2.86 - 2.70 2.59 
Wreater Oui... 220.2. 15.40 16.42 16.86 15.76 15,04 
Juste t 9G 0 gaeaamene TSE, 1919 | 190.72) AS Absa Eee 
We thus note that all the apparent teaching of the experiment is 
that ensilage has a food value beyond that of the raw material of 
which it is composed; that with grain feeding, fodder-corn has a 
value beyond that which common experience gives it; that potatoes 
are not of especial value for feeding in quantity. We would cau- 
tion that our cows were Jerseys, and it is possible that with other 
breeds a different result might be gained, or possibly there is a dif- 
ference between individual cows. We hesitate, therefore, to gen- 
eralize, but will be understood as discussing only the facts of our 
experiment. 
Before proceeding further, we will mass the data which the more 
complete weighings of four days of each period (except Period III, 
which includes but one day) furnishes, and which will serve for a 
further discussion, to be based upon figures, which must serve as 
premises, and which we believe are as accurate as can be obtained 
‘with our facilities, which include all that forethought and opportu- 
nity could supply. 
ies 
