MJ
U
 370 MINERALS YEARBOOK


ing the prices of electrolytic and ingot nickel are only approximations,
because there is no open market for these metals. The curves for United States
secondary and byproduct outputs of nickel indicate


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Electrolytic


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Ingot
ICES
c nickel
nickel
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II
II
II
I I
II I
II I
III
 190$ 1905 9)0 9)5 920 1925 930
FIGURE 14.—Outstanding trends in the nickel industry, 1901-32.

that only a small proportion of the domestic requirements is supplied internally.
 Canada continued to be the principal world source of virgin nickel, producing
15,184 short tons in 1932 or almost three quarters of the