Math. Coll. Works. 4*3911.1=*4*E.191.3
Newton, Sir I. Opera quae exstant...(Continued #2) viribus centralibus quée rationem triplicatée dis- tentiarum a centro contrariam inter se constanter servent, auctore Samuele Horsleio. 4. Optics: or a treatise of the reflections, refractions, in= flections, and color of light; Letters... reflecting telescopes; Letters relating to the theory of light and color...natura acidorun; Excitation of electricity in glass; Cause of grav-