OCR Text |
Show WAY TO READ CREAM TESTS One Big Difficulty May Be Overcoms by Adding Small Quantity of Fat-Saturated Alcohol. In the Iiabroek tea bottle the bottom bot-tom of the fat column la practically a straight Hue but the top hn a concave con-cave surface and the question aa to whether the fat tihould be read at the top, the bottom, or some other point han been much discussed. Thla uncertainty mny be entirely overcome by dropping a small q tan -' -H " ! A. " :l ": " i i- - V - to t 1 1 i z Li o Reading Cream Tests. tlty of alcohol Into the neck of the text bottle after the cream test l completed. The alcohol tloats In the top and changes Its concave surfaca to nearly a straight line. As tho usi of the ulcohol dlwHolves the fat, therefore there-fore reduces the length of the column col-umn nnd gives too low a rending, itili can be overcome by first adding tc, the alcohol all the fat It will Usno?ve and then pouring a email quantity of this fat saturated alcohol on the top of the fat column In the teat botle The diagrams In the figure show the difference. In bottle No. I It tiliows tlie top eurve of the fat which occupies a apace between A and D of nearly 1 per rent of the scale. The tent should be read 10 or 20, depending depend-ing on the selection of A or II as the point to which It Is read. In bottle No, 2 the alcohol make a straight line at the top of the fut column, so that the test can be rcna at that point without any uncertainty. |