Show 43 MILK TESTING Direct directions iona flow to ile do it 11 h in the ineat banner welk iu in 21 ZOOM loom with the temperature near 70 des de S keep 5 our chemical have 1 bottle for each ul ill which to keep a for testing pour directly from these into the tu tubes beit before taking a test sample with til pipette mix the milk well and a allow any air bubbles to escape tile tiie p pett must be completely full if it is dry the tibt filling will do it if not bot reject tho the iaia iiii t and take tile the second for a tes empty the i by blowing out ohp last drop into tho the flask fill the flask 4 filo ly to allow the nir air to escape A little practice in filling the dipetto and ami tubes with water will enable any one tu to tie do the work easily anil and rapidly avoid getting acid on the skin or clothing in case it gets thoro there bathe ba ahe the skin freely and nd apply to the clothing mis the contents of the flask tit at once after adding the tha acid hold hohl the colic in firmly to lo prevent its bing blown out the flask must bo be IN whirled until I 1 the lie fat is clear this requires frequently orly only fifteen secondi condi ge usually half a minute occasionally li longer if alio bottom of tho fat is below the lowest graduation add weak acid to raise raio it the fat should not appear cloudy or have much casein be lowit the former is duo due to too low a temperature pera ture tho the latter to insufficiently burong acid in III either cither caw case the test must lie be re repealed empty the flask while still hot and rinse with hot water any number of tests withie the capacity of the machine can bo be made ut at one time but filice the lie time of whirling is so 60 short nothing is gained binm in hirling more than eight at once in a warm room with rali I 1 work chii num number bercen can be made without the use of hot gatei with more than this or ina in a cooler room the flasks flacks have to stand in hot water a moment to keep the fat melted tile tests need not be completed at once after addin adding the milk alie flacks flasks may stand some time before adding the acid the order of the work may too be varied without altering the le sulta SUItE thus tile alcola 4 ol 01 may inay be added before or after the milk tho acid in one or more portions the weak acid before or after v whirling hirling I 1 zural new yorker |