History of natural philosophy, from the earliest periods to the present time

actual afterwards algebra Alhazen ancient angle appears application Archimedes Aristotle astronomy ation attempt Bacon bodies calculation called causes centre circle colours comets conic sections connected considerable construction Copernican system Copernicus curve deduced degree directed discoveries distance doctrine earth effect eminent enquiry equations established Euclid exact experiments extended fact fluxions force Galileo genius geometrical gravitation Halley Hipparchus Huyghens hyperbola idea important improvements inductive philosophy invention investigation Kepler knowledge known labours Laplace Leibnitz length libration light limits mathematical mathematicians means measure mechanical ments method method of exhaustion mind moon motion nature Newton object observations Optics orbit original parabola parallax perfect perhaps period phenomena philosophical physical planetary planets powers Principia principle problems Ptolemy published quantity ratio rays referred refraction Regiomontanus remarkable researches solar speculations stars success supposed telescope theory tion traced treatise truth Tycho Tycho Brahe universe whole