The elements of natural and experimental philosophy .. (1834)
Phillips, R. (Richard), Sir, 1767-1840, Smith, E. A · New York, M'Elrath, Bangs & Herbert · leaf 57
Fig. 11. Fit?. 12. … lllus. 1. A balance is a lever of the first kind, with equal arms ;see Fig. 11. 2. A steel yard, Fig. 12, is also the first kind of lever with amoveable weight. 151. How many kinds of levers are generally described ; and how arethey distinguished? 152. What is said of lovers of continuous…
Physics
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