Inconsistent spelling and hyphenation have been retained, except as mentioned below. The use of (linear) feet as unit of area has not been corrected. Inconsistent indentations have not been standardised.

Enlarged plates are available in the browser version, available at www.gutenberg.org.

Page 18-20: There is no separate description for Number 82.

Page 38, Number 277, cross bar A: the letter A is missing from the illustration.

Page 168 (plate) and Fig. 1372: the angle 60° was not clearly visible in the source document.

Page 218, Number 1747, screen A: the letter A is missing from the illustration.

Page 220, Number 1769, ... and other machinery: possibly a mistake for ... and other materials.

Page 228-230, Number 1854: there is no description for this item; presumably it is the same as that for Number 1855 (Bevilled flat iron).

Sections 107 and 108 may be found at the end of Part II.

Changes made:

Some obvious minor typographical errors have been corrected silently.

In several places where they were not present in the source document, blank lines have been inserted in order to distinguish notes from the previous description, or to emphasise the transition from one subject to the next.

Letters referring to elements in illustrations and characters representing shapes rather than letters have been standardised to sans-serif.

In several instances, ditto, do. and „ have been replaced with a repetition of the dittoed text.

Page 40: Eilipile has been changed to Eolipile.

Page 320: 75° has been changed to 75,