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Dairy Department, Michigan Agricultural College, East Lansing, Michigan
ABSTRACT
The average protein content of the normal samples of butter in these experiments was 0.3727 per cent.
The average protein content of the butter which was worked in the buttermilk was 0.5264 per cent.
The average protein content of the unwashed butter was 0.5177 per cent.
The average loss of protein due to washing the butter was 0.1450 per cent.
The protein content of the unwashed butter, churned at abnormally high temperature, was 0.5407 per cent.
The protein content of the butter to which starter had been added was 0.4718 per cent.
Nitrogenous compounds were not incorporated in the butter to any appreciable extent by using the methods of manufacture followed in these experiments.
One per cent was found to be sufficient allowance for all the constituents of butter which may be classified under the term curd.
By incorporating 15.5 per cent moisture and allowing 1 per cent for curd as much as 3.5 per cent of salt may be incorporated without reducing the fat content of the butter below 80 per cent.
No difference in score or selling price of the duplicate lots of butter was made upon the Chicago market.
Speckled butter was not found in any of the samples.
Milky brine was not found in any samples of the finished butter.
With the exception of one churning the keeping quality of the washed butter was slightly better than that of the unwashed butter.
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