Page 187, Fig. 32.: The text refers to "end I of the connecting rod", but this was labeled L on the Figure. This L has been crossed out and replaced by I.
Page 285: In "surrounding the boiler with iron-conducting substances", changed "iron-" to "non-".
Page 308: "exeitement" to "excitement".
There were several extended quotations, for example beginning on page 312, in which each line began with a quotation mark, with ending quotation marks at the end of each paragraph. In this edition, these passages have been marked by indentation, and all but the first and last quotation marks from each paragraph were removed.
Page 362: "acomplish" to "accomplish".
Page 366: Figs. 97-104 appeared originally between pages 385 and 399, as full-page prints. Numerically, however, they belong between Figs. 96 and 105--and therefore between pages 366 and 369. Therefore, they have been moved to a location between two paragraphs on page 367.
Page 368: "rivetted" to "riveted".
Page 419: "TREVITHECK'S INVENTION" changed to "TREVETHICK'S INVENTION", in the chapter heading. However, the references to Trevethick occur in a previous chapter, around page 324.
Page 468: Period added to end sentence "[...] piston is at the bottom of its stroke".
Page 490: Period added to end sentence "[...] therefore one eighth of its capacity".