Historical Essay on the First Publication of Sir Isaac Newton's PrincipiaUniversity Press, 1838 - 188 sivua |
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adeo æquales anno areæ Astronomy atque adeo axis Biographia Britannica Birch bodies calculations Cambridge celeritas centre centripeta centripetal force ciety cipia circular motion comets conatus copy corporis corpus curve dated David Gregory demonstration describatur distance diurnal motion duplicate proportion earth edition ejus ellipseos ellipsis Encyclopædia Britannica erit ether Fatio Flamsteed force gravity Gregory hæc Halley Halley's Hooke Hooke's Hugenius Hugens hyperbola hypothesis Isaac Newton latus rectum Leibnitz letter likewise lineam Macclesfield manuscript mathematical medii mention moon moon's motus Newton occasion Oldenburg orbit original Paget paper Pemberton phænomena Philosophical planets Principia Principia Mathematica printed probably projectiles Prop proposition published puncto quæ quam quod ratio reciprocally recta referred Royal Society says scholium seems sent shews squares sunt suppose supposition temporibus theorem theory thing third book thought tion Trans Transactions umbilicus writing written
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Sivu 60 - To derive two or three general principles of motion " from phenomena, and afterwards to tell us how the " properties and actions of all corporeal things follow " from those manifest principles, would be a very " great step in Philosophy, though the causes of those " principles were not yet discovered.
Sivu 64 - worker, generating fluids out of solids, and solids out of fluids, fixed things out of volatile, and volatile out of fixed, subtile out of gross, and gross out of subtile; some things to ascend, and make the upper terrestrial juices, rivers, and atmosphere; and by consequence others to descend for a requital to the former.
Sivu 61 - an impertinently litigious lady, that a man had as " good be engaged in law-suits, as have to do with " her. I found it so formerly, and now I am no " sooner come near her again, than she gives me
Sivu 61 - I designed the whole to consist of three books ; ... the " third I now design to suppress. Philosophy is such " an impertinently litigious lady, that a man had as " good be engaged in law-suits, as have to do with " her. I found it so formerly, and now I am no
Sivu 62 - Perhaps the whole frame of nature may be nothing but various contextures of some certain ethereal spirits or vapours, condensed as it were by precipitation, much after the manner that vapours are condensed into water, or exhalations into grosser substances, though not so easily condensible
Sivu 48 - of the earth, and the earth upon them, but that " Mercury also, Venus, Mars, Saturn, and Jupiter, " by their attractive powers have a considerable in"fluence upon its motion, as in the same manner the " corresponding attractive power of the earth hath a " considerable influence upon every one of their
Sivu 57 - and dilatation, strongly elastic, and, in a word, much like air in all respects, but far more subtile. 2. I suppose this ether pervades all gross bodies, but yet so as to stand rarer in their pores than in free spaces; and so much the rarer, as their pores are less.
Sivu 48 - curve line. The third supposition is, that " these attractive powers are so much the more power"ful in operating, by how much nearer the body " wrought upon is to their own centres. Now what " these several degrees are I have not yet
Sivu 58 - lower parts; and that grosser ether, being less apt to be lodged in those pores, than the finer ether below; it will endeavour to get out, and give way to the finer ether below, which cannot be, without the body's descending to make room above for it to go out into.
Sivu 71 - The whole book is interspersed with lemmas of general use in geometry, and several new methods applied, which are well worth the considering; and it may be justly said, that so many and so valuable philosophical truths, as are herein discovered and put past dispute, were never yet owing to the capacity and industry of any one man.