A Painter well acquainted with the muscles, Tendons, &c. will know what, and how many Muscles concur to the Motion of any Member; what Muscle contracting it self, occasions any other to retire; what Tendons and what Ligaments belong to each Muscle, and conspire to make it act: And will look with Contempt on the Manner of some Ignorant Painters, who in all sorts of Attitudes, do always make the same Muscles appear, in the Arms, Back, Stomach, and other Parts.