Mathematical discourses concerning two new sciences relating to mechanicks and local motion, in four dialogues. I. Of the Resistance of Solids against Fraction. II. Of the Cause of their Coherence. III. Of Local Motion, viz. Equable, and naturally Accelerate. IV. Of Violent Motion, or of Projects. By Galileo Galilei, Chief Philosopher and Mathematician to the Grand Duke of Tuscany. With an appendix concerning the center of gravity of solid bodies. Done into English from the Italian, by Tho. Weston, late Master, and now publish'd by John Weston, present Master, of the Academy at Greenwich [electronic resource].