Archaic and variable spelling has been preserved.
Variations in hyphenation and compound words have been preserved.
Fig 125. Design for Show Card is wrongly shown to be on page 223 in the list of illustrations. This has been corrected to page 233.
In the index 'Sheets Metal Dipping 40, 58', has been altered to 38, 58.
Page 40 was a blank page and page 38 is near and in context but maybe an inaccurate alteration.
Both middle and modern decimal points are used.
Fig 114 has been corrected by rotating it 180 degrees.