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alkali powder Alkali washing powder Animal heat April BABCOCK TEST bacteria per cc BACTERIAL RECORD BACTERIAL TESTS bacterium boiling water butter fat cent CHAPTER cheese cloth cleanliness cold water cooling tank COW STABLE cow's udder cows produce dairy barn dairy cows dairy farmers dairy inspector dairyman diphtheria dirty discharged ensilage equipment FAIR HAVEN germs growth of bacteria herds hot water KELTON DAIRIES laboratory lactic acid large numbers manure metal methods milk and night's milk produced Milk-house milker milking machine millions of bacteria mixed milk morning's milk night's milk numbers of bacteria old milk open cooler poor cows produce clean milk properly quarts of milk rinsed ROCKDALE samples scarlet fever Scrub Brushes shipping station Small Mouth small numbers smothered taste sore throat sour spring-water stable dust steam Stirring rods strainer cloth sufficient temperature TESTS OF MILK tons tuberculosis unclean Wash Pail washed and sterilized water supply York City
Page 9 - Our examples will be drawn largely from the field of physics, especially the concept of "invariance" or "invariability" — the idea that a substance or an amount to which nothing has been added and from which nothing has been removed remains unchanged in weight or quantity. The concept is not part of the thinking of the young child. As far as he is concerned, if the appearance of an object changes, if the shape changes, quantity and weight also change.
Page 124 - ... injection of tuberculin. 2. All cows shall be annually tested with tuberculin, and all re-acting animals shall be excluded from the herd. 3. No milk from re-acting animals shall be shipped to the City of New York for any purpose whatever. 4. The milk shall not contain more than 30,000 bacteria per cc when delivered to the consumer, or at any time prior to such delivery. 5. The milk shall be delivered to the consumer only in sealed bottles, which have been sealed at the dairy. 6. The milk shall...
Page 116 - All of this is because the factor which exceeds all others put together in importance is the dairyman himself.