Page 180, Du Pont Febrikoid Co.: probably an error for Du Pont Fabrikoid Co.
Page 207 and 208, footnotes [98] and [98a]: the source document has two anchors for this footnote. For this text the second instance has been renamed 98a, the footnote has been repeated.
Page 260, The harp is shown complete at C: Figure 109c does not show the complete instrument, and there does not appear to be another figure that does.
Page 276, Fig. 116: Presumably the dimensions provided are in feet rather than inches.
Changes made
Illustrations, tables and footnotes have been moved out of text paragraphs. The footnotes in the source document were not numbered consistently, they have been renumbered for this text.
Several obvious minor errors in typography and punctuation have been corrected silently.
Texts in dashed boxes under illustrations have been transcribed from the illustration, and do not occur as texts in the source document.
Page 3, illustration: items B and C interchanged.
Page 14: Removing Dust from Tools changed to Removing Rust from Tools.