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ALEXANDER NECKAM amber ancient appears Arabs Aristotle assertion Bacon became believed bodies Boyle Cabaeus Cardan cause century Chinese compass Descartes direction discoveries doctrine draw earth effect electric electrified England Etruscans existence experiments fact field of force fire followed Fracastorio Franklin Galileo Gilbert glass globe Guericke hand heavens hence Hist hypothesis induction instrument invention iron Klaproth knowledge known learned Leyden jar light lodestone London Lucretius magnetic attraction matter ment merely metal modern motion moved nature navigation Neckam north pole observed Olaus Magnus Paracelsus Peregrinus perhaps phenomena philosophers physical physicians pivoted polarity Pole star Porta probably reason regarded repelled Robert Boyle Roger Bacon Royal Society rubbed Sarpi says ships sparks sphere stone substance terrella theory things tion treatise tube turn variation vessel virtue voyages William Gilbert writing
Page 442 - That gravity should be innate, inherent, and essential to matter, so that one body may act upon another at a distance, through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking can ever fall iuto it. Gravity must be caused by an agent acting constantly according to certain laws; but whether this agent...
Page 417 - Heat is a very brisk agitation of the insensible parts of the object, which produces in us that sensation from whence we denominate the object hot ; so what in our sensation is heat, in the object is nothing but motion.
Page 412 - Resolution, to reject all the amplifications, digressions, and swellings of style: to return back to the primitive purity, and shortness, when men deliver'd so many things, almost in an equal number of words. They have exacted from all their members, a close, naked, natural way of speaking; positive expressions, clear senses; a native easiness: bringing all things as near the Mathematical plainness, as they can: and preferring the language of Artizans, Countrymen, and Merchants, before that, of Wits,...
Page 24 - The gift which you possess of speaking excellently about Homer is not an art, but, as I was just saying, an inspiration; there is a divinity moving you...
Page 128 - the sailors, moreover, as they sail over the sea, when in cloudy weather they can no longer profit by the light of the Sun, or when the world is wrapped up in...
Page 439 - If you press a stone with your finger, the finger is also pressed by the stone. If a horse draws a stone tied to a rope, the horse (if I may...
Page 543 - C, standing on the floor, both appear to be electrized; for he, having only the middle quantity of electrical fire, receives a spark upon approaching B, who has an over quantity ; but gives one to A , who has an under quantity. If A and B approach to touch each other, the spark is stronger, because the difference between them is greater. After such touch there is no spark between either of them and C, because the electrical fire in all is reduced to the original equality.
Page 439 - If a horse draws a stone tied to a rope, the horse (if I may so say) will be equally drawn back towards the stone; for the distended rope, by the same endeavor to relax or unbend itself, will draw the horse as much towards the stone as it does the stone towards the horse, and will obstruct the progress of the one as much as it advances that of the other.