Excerpt from The Zinc Industry
Thanks are also due to Mr. Ridge for valuable information and for kindly providing the illustrations of the roasting furnaces, and to Dr. F. C. Thompson for preparing the photomicrographs.
With regard to statistics the figures for the year 1913 have been given purposely in preference to those of subsequent years, as being more representative of the zinc industry under normal conditions. In many cases later figures are not procurable, some of the belligerent nations having ceased to issue them since 1914. Due consideration has, however, been given to the very marked influence of the war on the zinc industry.
A bibliography of some of the more important publications relating to the subject is appended.
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