Changes made
Tables and illustrations have been moved out of text paragraphs; footnotes have been renumbered sequentially and moved to directly under the paragraph where they are referenced.
In several of the tables data have been aligned more consistently than in the source document. Multi-page tables in the source document have been recombined into single tables in this text.
Some obvious minor typographical and punctuation errors have been corrected silently.
Text in a dashed box is text that does not occur as such in the source document, but that has been transcribed from the accompanying illustration.
Page ix: Platinum, by James H. Hill changed to Platinum, by James M. Hill.
Page 35: Dorfmund changed to Dortmund.
Page 45: Alden changed to Aden.
Page 50, Table 7: References to page 49 (Austria, Hungary) replaced with “above” cf. other entries.
Page 148: footnote anchor [78] inserted in table heading.