ECONOMICAL USE OF FUEL IX CREAMERIES. 
curves 
little 
shown 
groups 
The results shown in Table 1 have been plotted in the form' of 
curves in figure 1. Curve No. 1 represents the average number of 
pounds of coal consumed per 1,000 pounds of butter made in 206 
plants whose outputs vary from 45,000 to 1,000,000 pounds of butter. 
Curve No. 2 represents the average of the number of pounds of coal 
of 72 of the best equipped and managed plants, and curve No. 3 the 
average of 37 of the 
poorest equipped and 
managed plants. 
These curves are plot- 
ted from the average 
fuel consumption of 
the total number of* 
plants. 
Attention is called 
to the fact that in 
1 and 2 very 
difference is 
between the 
of creameries 
making 250,000 
pounds and those 
making 350,000 
pounds of butter an- 
nually. Curve 2, rep- 
resenting the best 
practice, is practically 
vertical between 250,- 
000 and 350,000 
pounds of butter 
made, showing that 
between those limits 
the fuel consumed in 
the better plants is 
practically the same 
per 1,000 pounds of 
butter made. Curve 
1, which shows the 
average full consump- 
tion of all the creameries, gives only a slight increase in the quan- 
tity of fuel between creameries of those sizes. The poorer equipped, 
and managed plants, as illustrated in curve 3, however, show a 
decided increase in fuel used per 1,000 pounds of butter made in 
the plants making between 250,000 and 350,000 pounds, the increase 
averaging about 300 pounds of coal per l,p0Q pounds of butter. In 
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Fig. 1. — Curves showing the variation in coal Tised for 
1.000 pounds of butter made in steam-driven, plants of 
different sizes — (nonpasteurizing plants). 
