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"... shows one of the commonest (sic) forms in which this kind of lever appears,-the crowbar. The power is applied at the handle. The weight is at the other end, and consists of something to be moved. The fulcrum is a stone on which the crowbar rests." —Quackenbos 1859

Crowbar

"... shows one of the commonest (sic) forms in which this kind of lever appears,-the crowbar. The power…

"... a farmer with a crowbar, as shown, can move a rock which with his hands alone he could not stir." —Quackenbos 1859

Crowbar and Stone

"... a farmer with a crowbar, as shown, can move a rock which with his hands alone he could not stir."…