A system of natural philosophy, designed for the use of schools and academies (1845)
Moffat, J[ohn] M. [from old catalog] · Philadelphia, E. C. Biddle · leaf 88
What name might properly be applied to the wheel and axle ? Otwhat does it consist ? In what ratio are the power and weight to eachother when this machine is at rest ? * From the Greek Ajr«», an axis, and ihpti to turn round. THE WHEEL AND AXLE. 85 … librium; so that the effect of this machine will depend on the supe-riority of the radius, or diameter of the wheel to that of the axle. 176. The wheel may be moved by a weight acting on its peri-phery, as already described; by projecting pins, or by a bent han-dle, such as is used for the common…
Physics
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-255-160.webp)
