Transcriber’s Notes:

Minor inconsistencies in punctuation have been standardised. All other original errors and inconsistencies have been retained, except as follows (the first line is the original text, the second the passage as currently stands):

• Page 33:
  Leipsic, in 1790. “I felt
  Leipsic, in 1690. “I felt
• Page 38:
  this calamity befel Papin’s machine
  this calamity befell Papin’s machine
• Page 111:
  he had sucessfully repaired an
  he had successfully repaired an
• Page 120:
  [caption missing]
  PAPIN’S DIGESTER.
• Page 128:
  it had been by chance and
  it had been “by chance and
• Page 176:
  exceeding good acromatic
  exceeding good achromatic
• Page 315:
  up your fortitute and try to
  up your fortitude and try to
• Page 404:
  Every pains was taken to
  Every pain was taken to
• Page 438:
  Symington was, ‘Why don’t you
  Symington was, “Why don’t you
• Page 447:
  chains and ratched-wheels, as in
  chains and ratchet-wheels, as in
• Page 447:
  proportionately elate at the
  proportionately elated at the
• Page 497:
  [caption missing]
  WATER-PIPE IN THE BED OF THE CLYDE.
• Page 516:
  Chasewater Mine and engine, 231;
  Chacewater Mine and engine, 231;
• Page 516:
  Chasewater, 235, 239, 242–3;
  Chacewater, 235, 239, 242–3;
• Page 517:
  Leman, William, Penzance, 69.
  Lemon, William, Penzance, 69.
• Page 518:
  Rumford gold medal, 525;
  Rumford gold medal, 425;
• Page 519:
  Sorbiere, M., on Marquis of
  Sorbière, M., on Marquis of
• Page 519:
  Papin, 67;
  Papin, 37;
• Page 519:
  Steam flour-mills, 291, 325–5, 327.
  Steam flour-mills, 291, 325–6, 327.
• Page 520:
  returns to Sotland, refused permission
  returns to Scotland, refused permission
• Page 520:
  Watt’s imperfecfections, 258;
  Watt’s imperfections, 258;
• Page 521:
  Wilkinson, John, of Brosely, constructs
  Wilkinson, John, of Broseley, constructs
• Page 521:
  William III. and Savary, 50.
  William III. and Savery, 50.
• Page VI:
  The Story of the
  “The Story of the
• Footnote 24:
  By Tho. Savory, Gent. London,
  By Tho. Savery, Gent. London,
• Footnote 32:
  a large, A, A, and a
  a large, A, and a
• Footnote 224:
  19th November, 1791.
  19th November, 1781.
• Footnote 361:
  substitute for isinglas, he occupied
  substitute for isinglass, he occupied