Archimedes $ or, Lib. i.

one side, and natural Philosophy onthe other. If according to its use andbenefit, we may then discern that tothis should be referred all those artsand professions so necessary for hu-mane society, whereby nature is notonly directed in her usual course, butsometimes also commanded againsther own law. The particulars thatconcern Architecture, Navigation,Husbandry, Military affairs, &c. aremost of them reducible to this art,both for their invention and use.

Those other disciplines of Logick,„ Rhetorick, &c. do not more protectand adorn the mind, than these Me-chanical powers do the body.

And therefore are they well wor-thy to be entertained with greaterindustry and respect, than they'com-monly meet with in these times;wherein there be very many that pre-tend to be masters in all the liberalarts, who scarce understand any thingin these particulars.

The subject of this art is concern-ing the heaviness of several bodies,