II

Cap, 2. Mechanical Powers.

or the proportion that is requiredbetwixt any weight, in relation tothe power which may be able tomove it. And so it refers likewiseto violent and artifical motion, asPhilosophy doth to that which is na-tural.

The proper end for which this artis intended, is to teach how by un-derstanding the true difference be-twixt the weight and the power, a manmay add such a fitting supplementto the strength of the power, that itshall be able to move any conceiva-ble weight, though it should never somuch exceed that force which thepower is naturally endowed with.

The art it self may be thus descri-bed to be a Mathematical discipline,which by the help of Geometricalprinciples doth teach to contrive se-veral weights and powers, unto anykind, either of motion or rest, accord-ing as the Artificer shall determine. Dtv - J (i~

If it be doubted how this may beesteemed a jpecies of Mathematicks ,Arc’bim.when as it treats of weights, and not fe centra

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