In the Plain Text version of this eBook, superscripts are indicated by ^{}, subscripts by _{}, italics by _paired underscores_, and boldface by paired =equals signs=. Underlining in the advertisement at the end of the book is indicated by _paired underscores_, not distinguished from italics. SUPERINTENDENT OF THE DEPARTMENT OF METALLURGY AND METALLURGICAL CHEMISTRY AT THE NATIONAL PHYSICAL LABORATORY…
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