two lM-,.,t.lM ,rtlll Mi, ;.,„ ' it^- * .
the t>0r ,M,Jit v f ja, )4§M, i!fc t; „ Ir| ^

Examination of - 1

in the >izt4 *>*' fat uloj'il*- .1. *
Of the same hivpti or • f htf^.i * •
betweon Jersey and Hollar ai.Lna,-. VN»'
Hkoelifl^ the size and grouping of fa J/ »**;'* - F
were made by Woll' cu the 21:^1! er UL 1 M " ...*
modified by the period of !aota*5o!i. un<l ! / t1 - .
the eo\v. He found that tin* pen* <I v : Li^'i,
irapoartant cause of vaiiat ion —that tlu .iv» *v.^ \ i
in O.OOCI1 cmm for all eo\\> Is 1HS, at !*• » ^* P.;T;II » j
period, and at its end b67. Tin u\ trace "r. !i
(per c*ent of fat divided by the rumUr ^ f ^1
cmrn.) of fat globules was found to Iv 290, 217
Jersey, Guernsey and Shorthorn, respectively.

17"

of Number of Fat Globules ™D" f 1

of froslh. milk to 500 cc and mix well. Prepare M\ tip ' i '
0.1-m.ncx inside diameter by heating 5-mm t iMriK ^ i ^ 4 ..'
Cut Irrfco pieces about 3 cm long. Dip tht t1 d >*' »M i a
the diluLted milk (recently mixed) and wfae i fJ id- i '
tubes t»y dipping them into vaseline. Place 01r f *!" •
upon -w filch lias been placed a drop of glycurir** aic< d'tt^
inside diameter by placing it in the field of a Ji^n^enr
micro xxx eter eye piece having 0.01-rnm divlsini^. Afff «
makio a, count of the number of fat globules contained i»,1 -r
equivalent to 20 or 30 divisions of the so *!«•. Repe it t n
and coxint, using another capillary tube. Fr< ni th*» d^ 21
and *klio length of the section in which tht count \\a-s r\
nunalxer of fat globules in 1 cubic millimettr of urtHatu1
forna of the fat globules in this and in a port'oi, i f t^t ~w'i «» xt ^T i .•
ized a-t 140° F.

In. -the experiment just described, the function ot the civ,;
is to eover the capillary tube with a fluid medium haviiu i^
the sa,me index of refraction as that of the gla#^, thu^ av ^* I

the m.agn.ifying effect of the curvature of the tulu, a- wtL
prevonting the apparent distortion of form of fat glo»n.li.

Foxnoaaidehyde Is very efficient as a preservative a*vl \v]
presort in so small an amount as 1 part in it will extend

the t>irne of milk preservation at least 24 hours at 15°
'•£». Exp. Std. Ann. Rep. II (1894).

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