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 87
a raised position by a ratchet wheel; or byusing the Universal Lever, which also acts by means of a ratchetwheel.* To what objection is it liable ? What is the construction of weighing machines for carriages ?What circumstance limits the utility of the simple lever ? How hasit been proposed to… … 173. But these modes of operation must be nearly uselesswhere it is requisite to raise a body to a great height, or move itthrough a considerable space, and for such purposes may be ad-vantageously employed the wheel and axle, sometimes calledAxis in Peritrochio,* which has generally been ranged…
Physics
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