Newton's Principia: The Mathematical Principles of Natural Philosophy 
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The book basicaly tells the physical problems faced by man during 16th centurie and provide the answer of the problems theoratically and practically
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Newton's Principia: The Mathematical Principles of Natural Philosophy Isaac Newton,N. W. Chittenden No preview available  2015 
Common terms and phrases
ABFD accelerative altitude angle aphelion appulse apsis arising ascend attracted axis body centre of gravity centripetal force circle comet common centre conic section conjunctly corpuscle cycloid cylinder density descend described diameter difference diminished diurnal motion drawn duplicate proportion duplicate ratio earth ecliptic ellipsis equal equator figure fixed stars fluid force of gravity given ratio globe greater greatest Hence hyperbola inches infinitum inversely Jupiter latitude latus rectum LEMMA length less let fall mean motion medium moon moon's move nearly Newton nodes observations orbit oscillations parabola parallel particles pendulum perihelion perpendicular plane principal vertex Prop PROPOSITION quadratures quantity of matter radius reciprocally rectangle resistance revolve right line satellites Saturn SCHOLIUM semidiameter side sine space sphere square subducted subduplicate ratio sun's superficies suppose syzygies tail tangent thence THEOREM tion trajectory triangle velocity vertex weight whole
Popular passages
Page 71  flows equably without regard to anything external, and by another name is called duration : relative, apparent, and common time, is some sensible and external (whether accurate or unequable) measure of duration by the means of motion, which is commonly used instead of true time ; such as an hour, a day, a month, a year.
Page 29  that—" this most beautiful system of the sun, planets and comets, could only proceed from the counsel and dominion of an intelligent and powerful Being. And if the fixed stars are the centres of other like systems, these, being formed by the like wise
Page 30  space, but he endures and is present. He endures forever and is everywhere present ; and by existing »always and everywhere, he constitutes duration and space. Since every particle of space is always, and every indivisible moment of duration is everywhere, certainly the Maker and Lord of things cannot be never and nowhere.
Page 76  it. AXIOMS, OR LAWS OF MOTION. LAW I. Every body perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed
Page 394  and in America ; the light of our culinary fire and of the sun ; the reflection of light in the earth, and in the planets. RULE III. The qualities of bodies, which admit neither intension nor remission of degrees, and which are found to belong to all bodies within the
Page 52  A short time before his death he uttered this memorable sentiment:—" I do not know what I may appear to the world ; but to myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, while the great ocean of truth lay all undiscovered before me.
Page 60  the forces of gravity with which bodies tend to the sun and the several planets. Then from these forces, by other propositions which are also mathematical, we deduce the motions of the planets, the comets, the moon, and the sea. I wish we could derive the rest of the
Page 71  or celestial space, determined by its position in respect of the earth. Absolute and : relative space, are the same in figure and magnitude ; but they do not remain always numerically the same. For if the earth, for instance, moves, a space of our air, which relatively and in respect of the earth remains
Page 514  hath placed those systems at immense distances one from another. This Being governs all things, not as the soul of the world, but as Lord over all ; and on account of his dominion he is wont to be called Lord God
Page 60  and to this end the general propositions in the first and second book are directed. In the third book we give an example of this in the explication of the System of the World ; for by the propositions mathematically demonstrated in the former books, we in the third derive from the celestial