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It has been shown that a statistically significant decline in the level of solids-not-fat in milk from Dairy Shorthorn first calvers occurred in the months of January, February, March, April and August. The period of the survey was the 12 years from 1935 to 1946.
1. The results of experiments on the changes with temperature in the relative viscosity and viscosity of whole milk have been considered.
2. Some inconsistencies have been traced and amendments proposed.
3. It has been suggested that values for the relative viscosity and viscosity of whole milk cannot usefully be regarded as independent of the experimental circumstances in which the observations were obtained.
4. Empirical curves have been calculated for the viscosity-temperature relations, in forms convenient for practical use in circumstances similar to those of the experiments examined.