Traité de mecanique, ou l'on explique tout ce qui est necessaire dans la pratique des arts, & les proprietés des corps pesans lesquelles ont un plus grand usage dans la physique
A French treatise on mechanics by the astronomer and geometer Philippe de La Hire, reissued in Paris in 1729 for engineers, artisans and students of physics. The plates are line diagrams of levers, inclined planes, pulleys and centres of gravity, built from letter-labelled points, arcs and intersecting rules that yield spare geometric line art and lettering.
