Remarks on the text:
- p. vii and 371: the list of contents lists Electric Concentrators, the text deals with Magnetic Concentrators.
- p. 171/172 (text of patent): one closing quote mark is missing.
- p. 291, Swammerden: this refers to Jan Swammerdam (1637-1680).
- p. 373, condicon: possibly error for condicion or a similar word.
- p. 239, M. Mege, a French chemist: this refers to Hippolyte Mège-Mouriès (1817-1880).
- p. 408, Alte Deutscher Drehling Der Ruckladungs Gewehre: the reference is to Alte Rückladegewehre: Alt-Deutscher Drehling.
- p. 428, photograph: the chain of perforated cards is hardly visible in the original work.
- Index: the entries are not fully alphabetically sorted; this has not been changed.
- The order of subjects as given in the table of contents and in the chapter headings is not always the order in which the text gives them; the table of contents is sometimes slightly different from the chapter headings; this has not been changed, the hyper-links point to the proper paragraph. The table of contents is not complete: many subjects are not listed.
- In several instances the author uses knots for distance and knots per hour and feet for speed; this has not been changed.
Changes made:
- Footnotes and illustrations have (where appropriate) been moved in order not to interrupt the text.
- Several illustrations: reference letters have been enhanced for better visibility.
- Some obvious punctuation errors have been corrected silently.
- If both ligature and single letters occur in the same word in the text (with the exception of the advertisements), these have been standardised: ae/æ to æ (anæsthetics); e/é to é (Carré, Lindé, Niépce); oe/œ to œ (homœopathy, Phœnix).
- The original work uses fractions of the form 1⁄2 as well as 15-16. These have been standardised to x⁄y.
- p. v: Nitroglycerine changed to Nitro-Glycerine as elsewhere
- p. vi, Chapter Photography: The Platinotype added as in the chapter heading
- p. 6: Kinetescope changed to Kinetoscope as elsewhere
- p. 7: Hahneman changed to Hahnemann
- p. 9: Perkin’s changed to Perkins’
- p. 10: Rhumkorff changed to Ruhmkorff
- p. 11: Foucalt changed to Foucault; Herman’s changed to Hermann’s
- p. 15: ecomony changed to economy
- p. 29: choking coils k k changed to choking coils k k′ as in illustration
- p. 35: Gallilee changed to Galilee
- p. 37: Somnenberg changed to Sonnenberg
- p. 41: and other changed to and others
- p. 47: corruscations changed to coruscations
- p. 51: Badensburg changed to Bladensburg
- p. 87: Chrstian Era changed to Christian Era
- p. 88: Plante changed to Planté
- p. 89: PLANTE changed to PLANTÉ (2x)
- p. 92: commerical changed to commercial
- p. 93: electrictiy changed to electricity; TROUVE’S changed to TROUVÉ’S
- p. 95: St. Petersburg changed to St. Petersburgh
- p. 97: atached changed to attached
- p. 98: whch changed to which
- p. 105: colon in list of patents changed to comma (2x) as elsewhere
- p. 108: Ninetenth Century changed to Nineteenth Century
- p. 129: air-brake changed to air brake as elsewhere
- p. 133: Pennsylvaina changed to Pennsylvania
- p. 150: greater that changed to greater than
- p. 153: for from changed to far from
- p. 159: sterereotyping changed to stereotyping; Edinburg changed to Edinburgh as elsewhere
- p. 160: the the wire cloth changed to the wire cloth
- p. 182: vearly changed to yearly
- p. 188: Manufacturning changed to Manufacturing
- p. 235: ilustrative changed to illustrative
- p. 237: half a millions changed to half a million
- p. 240: carry- a fractional per cent. changed to carrying a fractional per cent.
- p. 247: irresitable changed to irresistible
- p. 248: acetanalide changed to acetanilide; OPHTHALMOMETER changed to OPTHALMOMETER as elsewhere
- p. 250: rationallen Heilkunde changed to rationellen Heilkunde
- p. 253: bactilli changed to bacilli
- p. 260: vélocipéde changed to vélocipède; celérifère changed to célérifère
- p. 261: vélocipéde changed to vélocipède
- p. 265: Metiers changed to Métiers
- p. 285: Middeburg, Middleburg changed to Middelburg
- p. 301: Niepce's changed to Niépce's
- p. 309: advertisment changed to advertisement
- p. 324: currrent changed to current
- p. 389: fire-arms changed to firearms as elsewhere
- p. 395: must must changed to must
- p. 401: Moncrief changed to Moncrieff
- p. 412: Livermore-Russel changed to Livermore-Russell; Russel changed to Russell
- p. 416: pulvurulent changed to pulverulent
- p. 425: effciency changed to efficiency
- p. 462: latrobe stoves changed to Latrobe stoves
- p. 469: Acetanalide changed to Acetanilide
- p. 470: Cemementation changed to Cementation.