This transcription follows the original printed work; inconsistencies in spelling, lay-out, hyphenation, etc. have been retained, except as mentioned below.

Minor differences between the table of contents and the chapter/section headings have been retained; the numbering of sections in the text has been made consistent with the numbering in the table of contents.

Illustrations that are too small to show all detail have been linked to larger illustrations; this is not supported by all formats.

Phrases such as drawn to scale, full size and other similar references to scale are, of course, not applicable to this e-text.

Page 145, ... are about brazing ...: probably an error for are about to braze or are brazing.

Page 196, table, row 8 column 6: the move should be either 11-16 or 12-16. The second digit in the first number is illegible, and has been replaced by a question mark. Columns 3-7 appear to be off by one row, this has not been changed.

Page 418, paragraph The next thing is the glass, ...: A, three and a quarter; B, three and an eighth; C, three and an eighth; D, three and an eighth; E, two and three-quarters should possibly be A, three and a quarter; B, three and an eighth; C, three; D, two and seven-eighths; E, two and three-quarters.

Page 476, “sort of lattice”: the original work shows separate letters/symbols, not the lattice described.

Changes and corrections made to the text:
Illustrations have been moved to where they are explained or fit best
Minor obvious punctuation, formatting and typographical errors have been corrected silently
M.A/m.a. and other degrees and titles standardised to M.A. etc.
Page 47: ... fixed ... changed to ... fixed at ...
Page 79: I. added before heading How to make a Boat ...
Page 94: Stansfield-Hicks changed to Stansfeld-Hicks
Page 139: B B (Fig. 2) changed to B (Fig. 2)
Page 140: ... have to bent ... changed to ... have to be bent ...
Page 141: Fig. 11 rotated 90°
Page 151: Fig. 15 rotated 90°
Page 173: + changed to † as elsewhere (in chess game)
Page 194: (or 26 to 22) moved to previous line
Page 204-207: go-ban notation standardised to, for example, a1
Page 210-211: point references standardised from, for example, A 1 and A1 to A1
Page 211, game: ... the Black’s attack ... changed to ... Black’s attack ...
Page 213: 214,365 changed to 2, 1, 4, 3, 6, 5
Page 223: (see Fig. 5) changed to (see Fig. 4)
Page 261: ... zeotropic pictures ... changed to ... zoetropic pictures ...
Page 342, calendar: border added between columns 04 and 05
Page 347: caption added to Fig. 1
Page 358: captions added to Fig. 3
Page 369: in-line illustrations have been moved to what seemed the best location
Page 483: captions added to Fig. 1 and Fig. 2; ... the little bit (b) ... changed to ... the little bit (c) ...
Page 492: caption added to Fig. 1 and 2
Page 516: F changed to Fig. 3. (caption)