
New York AGRICULTURAL EXPERIMENT STATION. 159 
although from seventy-five to eighty per cent of all the globules 
present in the milk were below two micrometer scale divisions in 
diameter. | 
As illustration of the great differences in milk in the operation 
of creaming, depending upon this difference in the relative size of 
the fat globules, the following experiment is given with one sample 
of Jersey and another sample of Ayrshire milk. 
These two samples were set in half liter cylinders, aé a depth of 
eleven inches, at 6.45 A. M. and at intervals, without disturbance 
of the milk, small portions were taken from the bottom for the 
determination of fat with the following results : 
JERSEY MILk. 
ors bo & 
Oc Sen 
BU Meee werrom DOttOI ok). is... 2 ee en ees 18 2.9 
TD OO mia sdrerw-crom bottom: ..66i% 6. os see ee eas 28 1.5 
Lh SOjeeeirew irom bottom © fond ole Oa dine: 26 Lit 
DO Paar LAWS ITOM. DOGLOM! 6 esis ss co sos adie cw eleheees 28 1.0 
er POW CLOT OIC OI1G oe el ee. cee bid leieae ee 26 6.4 
AyRSHIRE MILK. 
0.0. fet tae 
EAI. C1LOW (ECU UUOLN fre sielale's Gee ented cites Cae ce 18 3,0 
PAIRS NE CY GW. GOI MIG EEOUL (isthe Sale wtele laa ald ai galsiia we 28 2. 
Me A AE, ArOWiPOneGOUSLOM tc niche an Sera enue weal ete loi 28 2. 
POMP, AT OWSERORT DOUGOIL Go -ainsecetalans Ge oo oe Re UatA daly fate 25 hh 
Peer, WM.y CVO WRTEOM NICOL 0/5 5's etary Mag ate fae eGov a «scare 27 3 
The contrast is quite marked, and it will be seen that the Ayr- 
shire milk, although containing far less fat, was, after six and a 
quarter hours, setting much richer in fat in its lower portion than 
was the Jersey milk. It will be seen, also, that after a fifth of the 
milk had been withdrawn the portion taken from the middle of 
the remaining 400 c.c. was richer than the original milk in fat in 
both cases. | . | 
This simple experiment shows also the fallacy of any attempt 
at determining the value of any method of creaming which 
depends upon the analysis of a small portion of milk drawn from 
the bottom of the sample under experiment. 
