Changed "Watts's" to "Watt's" in footnote 1 on page 149: "Watt's improvements."
Changed "locks" to "blocks" on page 151: "blocks, and plates."
Something is wrong with the sentence on page 153 that ends with the reference to footnote 3. One metreta is larger than one-sixth of a congius. Perhaps "metreta" and "congius" should be swapped in this sentence, but it was left as is.
Changed "bail" to "bale" on page 153: "iron semi-circular bale."
Changed "Fosilium" to "Fossilium" twice in the footnote on page 155: "De Natura Fossilium."
Changed "decends" to "descends" on page 166: "descends into an underground chamber," and again on page 190: "the plank descends."
Changed "Pig-skin" to "Pigskin" in the caption to the illustration on page 168: "Pigskin sacks."
Left "vapor" as is in footnote 20 on page 210 although it's spelled "vapour" everywhere else, because it's in a quote.
Changed "de hydrated" to "dehydrated" in the footnote on page 221: "Probably dehydrated alum."
Changed "Na2Co3" to "Na2CO3" in the footnote on page 222.