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Data of J. J. Hinman, Jr., Indianapolis Department of Public Health
Fig. 103. Monthly Averages of Butterfat Contained in Milk on the Indianapolis Market, 1906 to 1913. The Curves Represent Averages from Several Hundred Samples each Month
In order to find what fluctuations are typical for various months of the year, it is convenient to chart the
data as seen here with curves for different years one above the other. Definite peaks in April and in
October or November are seen at once. This chart is drawn on the same universal co-ordinate paper
shown also in Fig. 57, Fig. 130, Fig. 134 and Fig. 156
