History of natural philosophy from the earliest periods to the present day1834 |
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
abstract actual adopted advance afterwards algebra Alhazen ancient angle appears application Archimedes Aristotelian Aristotle astronomical attempt Bacon bodies calculation called Cartes cause centre century circle colours conceived conic sections connected considerable construction Copernican system Copernicus cultivation curve cycloid deduced degree Diophantus discoveries distance earth effect enquiry equations established Euclid evinced exact experiment extended fact fluxions force Galileo genius geometers geometrical gravitation hence Hipparchus HISTORICAL VIEW Huyghens hyperbola idea important improvements instance invention investigation Kepler knowledge labours laws laws of Kepler Leibnitz length light limit mathematical mathematicians measure mechanical method mind moon motion nature Newton object observations optical orbit original parabola parallax perhaps period phenomena philosophical physical planetary planets principle problem Ptolemy published quantity ratio rays referred refraction Regiomontanus remarkable researches solar speculations stars supposed tangent telescope theory thing tion traced treatise truth Tycho whole
مقاطع مشهورة
الصفحة 339 - I now design to suppress. Philosophy is such an impertinently litigious lady, that a man had as good be engaged in lawsuits, as have to do with her.
الصفحة 35 - What is the side of a square whose area is equal to that of a circle 452 feet in diameter ? Ans. ^(452)
الصفحة 319 - ... the squares of the periodic times are as the cubes of the distances from the common centre, the centripetal forces will be inversely as the squares of the distances.
الصفحة 187 - This therefore being granted, methinks that in the discussion of natural problems we ought not to begin at the authority of texts of Scripture, but at sensible experiments and necessary demonstrations...
الصفحة 265 - That all bodies whatsoever, that are put into a direct and simple motion, will so continue to move forward in a straight line, till they are by some other effectual powers deflected and sent into a motion describing a circle, ellipsis, or some other compounded curve line.
الصفحة 255 - Our business was (precluding matters of theology and state affairs) to discourse and consider of philosophical enquiries, and such as related thereunto: — as Physick, Anatomy, Geometry, Astronomy, Navigation, Staticks, Magneticks, Chymicks, Mechanicks, and Natural Experiments; with the state of these studies and their cultivation at home and abroad.
الصفحة 155 - It is now eighteen months since I got the first glimpse of light, three months since the dawn ; very few days since the unveiled sun, most admirable to gaze on, burst out upon mo.
الصفحة 357 - I know not what the world will think of my labours, but to myself it seems that I have been but as a child playing on the sea-shore; now finding some pebble rather more polished, and now some shell rather more agreeably variegated than another, while the immense ocean of truth extended itself unexplored before me.
الصفحة 349 - Newton came from chapel, and had seen what was done, every one thought he would have run mad, he was so troubled thereat that he was not himself for a month after.
الصفحة 155 - I will indulge in my sacred fury ; I will triumph over mankind by the honest confession, that I have stolen the golden vases of the Egyptians*, to build up a tabernacle for my God far away from the confines of Egypt. If you forgive me, I rejoice; if you are angry, I can bear it: the die is cast, the book is written ; to be read either now or by posterity, I care not which : it may well wait a century for a reader, as God has waited six thousand years for an observer.