. Market dairying and milk products. le tothe zero mark with water. Remove any drops adheringto the inside of the neck with a coiled piece of filter orblotting paper. Now slowly add measured amounts ofwater from an accurate burette graduated to at least Every of water run into the neck is equiv-alent to on the scale of an 18 gram cream bottle on a 9 gram cream bottle. That is, with an 18gram 30% bottle, 6 of water would be required toexactly fill the scale on the neck. In calibrating milk and cream bottles, different partsof the neck should be tested as well
. Market dairying and milk products. le tothe zero mark with water. Remove any drops adheringto the inside of the neck with a coiled piece of filter orblotting paper. Now slowly add measured amounts ofwater from an accurate burette graduated to at least Every of water run into the neck is equiv-alent to on the scale of an 18 gram cream bottle on a 9 gram cream bottle. That is, with an 18gram 30% bottle, 6 of water would be required toexactly fill the scale on the neck. In calibrating milk and cream bottles, different partsof the neck should be tested as well as the neck as awhole. Calculating Speed of Tester. The speed at whicha tester must be run is dependent upon the diameter ofthe wheel carrying the bottles. The larger this wheelthe fewer the revolutions it must make per minute toeffect a complete separation of the fat. In the following table by Farrington and Woll thenecessary speed per given diameter is calculated: ?Bulletin No. 145, Indiana Experiment Station. 58 MARKET DAIRYING. Fig. 20.—Steam Babcock Tester. Testing Cream. The testing of cream is explainedin detail in Chapter VII. CHAPTER VI. COMPOSITE SAMPLING. Where milk is bought on the fat basis, it is essentialthat it be sampled daily as it arrives at the creamery. Itis not practicable, however, to make daily tests of thesamples because this would involve too much work. Eachpatron is therefore provided with a pint jar to whichsamples of his milk are added daily for one or twoweeks, the sample thus secured being called a compositesample. A test of this composite sample represents theaverage percentage of butter fat in the milk for the periodduring which the sample was gathered. Careful experiments have shown that quite as accurateresults can be obtained with the composite method oftesting as is possible by daily tests, besides saving a greatdeal of work. This has lead to its universal adoptionwherever milk is bought by the Babcock test. All composite jars should be ca
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdairyin, bookyear1912
