99 
BULLETIN 9 b 
U. 
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Fig. 16. — Comparative costs for labor and for interest and depreciation on equipment 
in washing "bottles by different methods at plants of various sizes, based on labor 
costs at 91 plants and prices for 1914. The cost of both labor and machinery has 
greatlv increased since these figures were obtained: the figures are useful, however, 
to shoV the comparative costs with the different methods used. 
