Pages 214-5: Plate 8.: 'Pattern's' corrected to 'Patterns'.
"Selection from Gaskill, Copper & Fry's Book of Patterns"
Page 237 (also pp. 244, 246, 246. 250, 251, 252, 258, and Index): 'AQUA REGII' corrected to 'AQUA REGIA' ('royal water' or 'king's water'), a mixture of nitric acid and hydrochloric acid (The transcriber could not find any reference to 'aqua regii', and assumes it to be a spelling error by either the author or the printer.).
'nitrous acid' corrected to 'nitric acid', which appears in the next paragraph.
"So called from its power to dissolve gold, is a mixture of nitric acid (aquafortis) and muriatic acid, (spirits of salts,)...."
Page 244: 'OHANGE' corrected to 'ORANGE'.
Page 289: If you have an older browser which does not display Latin reversed 'c', here is a workaround, using instead Latin small letter open 'o' (which looks a bit similar):
TRANSLATION OF DATES.
Many old books have their dates printed in a manner which puzzles the finisher, should he be required to date any so printed, which are too thin to admit of its being done as on the title-page. The following key is here given, as it may be found useful in such cases:—c. 100; Iɔ, or d, 500; cIɔ or m, 1000; Iɔɔ, 5000; ccIɔɔ, 10,000; Iɔɔɔ, 50,000, cccIɔɔɔ, 100,000. Thus, cIɔ, Iɔ, clxxxviii—1688. While on this subject, it may not be inappropriate to notice the dating of some books printed in France during the republic in that country. Thus, "An. xiii."—1805, that being the thirteenth year of the republic, which commenced in 1792.
Page 313 et seq.: Some Index entries which had been transposed have been returned to their correct places.