New YorK AGRICULTURAL EXPERIMENT STATION. 147 
Taste [V.— SHow1nc Amount or Acip IN FresH MiLtK AFTER BEING CAR- 


BONATED. 
Untreated Carbonated 
: AGE OF MILK AFTER BOTTLING. . mille. milk. 
Days Per ct. Per, ct: 
Pree ite ae ee Node, we BOSS bo ad he My eS 0.22 0522 
IDO eer ni nc Wid! Olntele wi diercne vce ¥ oleae’ O222 0.24 
acre n eee ok os on Caled bs Sede cecbuas Di 23 0.41 
aoc ALS Ree a O23 0.32 
ale we oe LT Stas) Bs St oe SR ae ial eo a c0..50 0.40 
i ee are d1.04 a0..36 
We gen end ys) Ae pn ES ee YS Oe a iy ee ee he a rer ad 60.47 
NaN te he OO eke ts acy stam aie alah Atysesaln’Niae woe-a'c wie age ive Sel yes b0.54 
PEI itat | eed Sh Sky bd tower pee Poe ek olharer mele Be b0 .66 
PE Ae ee er AOD. eat ale eS See ee 7 iets he Be Ach oi b0.72 
EMER Et fre cies et A game ey. sete her. BSS salgaee hie. (ELL LCAN b0.76 



a Slight coagulation on boiling. 
b Casein mostly coagulated on boiling. 
c Coagulation complete on boiling. 
d Coagulated and sour. 
These results agree with those previously obtained in showing 
that the formation of lactic acid is delayed by the presence of 
carbon dioxide under pressure. In this experiment, it is notice- 
able that the untreated milk remained in good condition for 
three days and then formed acid very rapidly. 
SIXTH EXPERIMENT: EFFECT OF TREATING FRESH MILK, PASTEUR- 
IZED AND UNPASTEURIZED, WITH CARBON DIOXIDE UNDER 
PRESSURE, 
We next bottled milk with carbon dioxide under a pressure of 
70 pounds, using fresh, whole milk both unpasteurized and pas- 
teurized at 185° F. The milk was kept at a temperature of 
40°-45° F. The results are tabulated below. 
TABLE V.— SHowiNG AMOUNT oF AciID IN FResH, WHOLE MILK, PASTEUR- 
IZED AND UNPASTURIZED, CARBONATED AND UNTREATED. - 


| ‘ 
Whole milk, | Whole milk, | Whole milk, 
AGE oF MILK AFTER BOTTLING. unpasteurized, |pasteurized and 

unpasteurized. carbonated. carbonated. 
Days. Per ct. Per ct. Per ct. 
RN GRP We A ices lied Bb oes wea es 0.25 0.25 0.25 
eS Oe Oe Ee eee EL Cr He Oe tte ca MM Perr om Be 0.29 
PRE et NA ORS. eh ret seo a ee eee Tbe et eae hee On2S 
ES a ee ee eee a ar oP ad .54 0.29 0.23 
EES 5 te oe ab ahs cera Mint Sek eialhs Sele ee a 0.45 0.23 
RE ES Sb ae oo tm, . kath cule | Seth ee Micraas #1. sine oe Minne ates 0.24 
PER teeters EGS >Re a ee 
RM St 5 ste BSc ala- 5 o ohs cuaitlte onc Inde te LT ane 0.58 0.25 
AEA Te Rr euler as fe TALE OP SON ore Palegs 0.68 O27 
ere a lc okey alte hk is ewe ana 0.79 Oi ca 
iS sete lo ake Me Se Ie A me ee Cee 5 Ree sO es ae a0.83 0.28 


a Coagulated and sour. 
