Petrograd: M. M.Stasiulevicha, 1915. Newton, Isaac (1643-1727). Matematicheskiye nachala natural’noy filosofii. Translated from Latin with notes and explanations by A[leksei] N. Krylov. 2 vols. vi, 276; [4], 277-620pp. 36 plates. Petrograd: M. M. Stasyulevich, 1915-16. Original printed wrappers, spines restored, edges of wrappers repaired, front wrapper of Vol. 1 a bit creased, a few tiny chips. Library stamps on titles and last pages of both volumes, some ink lines in the margins. Very good. First Edition in Russian of Newton’s Philosophiae naturalis principia mathematica (1687), made by Russian naval engineer and applied mathematician Aleksei Nikolaevich Krylov (1863-1945), who became internationally famous for his works on magnetic compasses, ship floodability, hydrodynamics and computational mathematics. He built the first machine in Russia for integrating ordinary differential equations, and in 1931 published a paper on what is now called “Krylov subspace,” dealing with…