52 
BULLETIX 1067, U. S. DEPARTMENT OF AGRICULTURE. 
The above wages are approximately 25 per cent greater than those 
paid in 1917. In considering the above table, it must be remembered 
that the plant operator is usually furnished a house and garden and is 
able to engage in agriculture on a small scale. In some cases he is 
able to do considerable repairing of farm machinery in addition to his 
duties at the pumping plant. Wages therefore are considerably lower 
than those paid in commercial plants,, where full time is required. 
£30 
I 20 
s 
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i 1 j 1 1 1 1 
III 1 
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1 
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- Plant per Acre /n / 9/7 and /9/9 
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d/agram s/iow/ng f/xed charges 
per Acre per Year for Dpa/nage 
Pumping Plants /n Lou/s/ana, 
Based on 19/9 Cost of Plant 
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1 
2 3 4 5 
Thousands of Acres /n Project 
Fig. 
-Cost of pumping plants and fixed charges per acre per year. 
The actual costs of some of the plants tested are shown in figure 8. 
The costs for 1919 were obtained by increasing the 1917 price by 8S 
per cent, which is the average increase in the cost of material and 
labor. The two lines for each year represent approximately the 
upper and lower limits of cost, depending upon the type of plant 
constructed. 
The upper limit of fixed charges per acre per year was obtained by 
taking the interest on the upper limit of cost of pumping plant per 
acre for 1919 computed at 6 per cent and adding an annuity on a basis 
of 4 per cent that will replace the plant in 15 years; the lower limit was 
obtained by taking the interest on the lower limit of cost per acre for 
