150 STORRS AGRICULTURAL EXPERIMENT STATION. 
THE EFFECT OF ‘SILAGE ON THE ACIDITYsOm 
MILK. 
REPORTED BY B. B. TURNER-AND C. L. BEACH. 

The milk of two cows, ‘‘Naomi’s Beauty’’ and ‘‘ Ethel’s 
Fancy,’’ was titrated with a standard soda solution, using phenol 
phthalein as indicator. All results are calculated as per cent. 
of lactic acid. Preliminary experiments showed that the al-~ 
most total absence of lactic acid bacteria in the college barn 
made special precautions against souring almost unnecessary. 
The milk showed no increase of acidity after standing in the 
laboratory at ordinary temperature for one or two days. A 
slight decrease in acidity in the first few hours was noticed. 
However, the samples were taken direct into clean bottles, and 
were kept in cold storage until titrated, usually the same day. 
The milk of both cows was treated exactly alike, and was 
titrated simultaneously. The test covered three periods. Dur- 
ing Period I. both cows were fed a ration containing about 
forty pounds of silage per day, which they had been receiving 
for five months or more. In period II. Naomi’s Beauty was fed 
on the silage ration, while Ethel’s Fancy received a ration 
without silage. During Period III. the ration was changed 
for both, Ethel’s Fancy going back to the silage, while Naomi’s 
Beauty received none. ‘he results are given below. 
TABLE 69. 
Result of Acidity Test. 











: ; aan | Naomr’s Beauty. | ETHEL’s FANCY. 
PERIOD. ety ee 5 a | | 
i A & | Silage. | Nosilage. | Silage. | Nosilage. 
| | 
[ee =U pte, May 13th asi sO ane — 0.16% — 
| We - | May 13th to 20th, | 4 | 0.11% — a eee Oe 
ITI. - | May 20th to 27th, | 9g | — O7T3G. 5 A OVLOG — 
| 







