English physicist and mathematician; he developed calculus, conceived of universal gravitation after seeing an apple fall in his garden, discovered the composite nature of white light and the ability of a prism to separate colors, and studied chromatic aberration and, to eliminate it, invented a form of reflecting telescope. Exceedingly rare ink signature on 2 x .5 slip which has three faint vertical lines. Light soiling, otherwise fine condition. COA John Reznikoff/University Archives and RRAuction COA.
