Page 45: "had a diameter of only one square foot" changed to "had a diameter of only one foot".
Page 47: "immedate" to "immediate".
Page 51: "a a level" to "a level". Also, comma removed from "A gauge, pipe is inserted".
Page 53: "proportionably" to "proportionally".
Page 79: A paragraph beginning "He was not fourteen" contains three double quotation marks; this is presumably an error. Possibly there should be two double quotation marks and two single quotation marks.
Page 80: "S'. Gravesande" is retained, although this probably refers to a person known as "'s Gravesande".
Page 103: "gases n general" to "gases in general".
Page 122: comma removed from "process may, be continued".
Page 123: "two thin pipes F G of tin" to "two thin pipes F, G of tin".
Page 172: "empyrical" to "empirical".