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according action already appears applied asserted astronomers astronomy attempts attraction bodies calculation called cause changes colours complete conceived confirmed consequence considered crystal depends determined difficulty direction discovered discovery doctrine earth effect employed equal established experiments explained expressed facts falling fluid force further Galileo gave give given gravity heat Huyghens hypothesis important increase kind knowledge labours light manner mathematical mathematicians matter means measure mechanical method mode moon motion move namely nature Newton Newtonian notice object observations obtained opinion optical orbit particles period phenomena philosophers physical planets polarization principles problem produced progress proved published quantity question rays reasoning reference reflection refraction remarkable respecting result rule says seen showed solution sound speak step supposed surface tables temperature term theory tion trace true truth universal vapour various vibrations views
Pagina 53 - There it was that I found and visited the famous Galileo, grown old, a prisoner to the Inquisition for thinking in astronomy otherwise than the Franciscan and Dominican licensers thought.
Pagina 158 - As he sat alone in a garden, he fell into a speculation on the power of gravity ; that as this power is not found sensibly diminished at the remotest distance from the centre of the earth, to which we can rise, neither at the tops of the loftiest buildings, nor even on the summits of the highest mountains ; it appeared to him reasonable to conclude, that this power must extend much...
Pagina 439 - ... public, than to obtain an inward approval which has always been the sweetest reward of my efforts. Without doubt I have often wanted the spur of vanity to excite me to pursue my researches in moments of disgust and discouragement. But all the compliments which I have received from MM. Arago, De Laplace, or Biot, never gave me so much pleasure as the discovery of a theoretical truth, or the confirmation of a calculation by experiment.
Pagina 189 - And thus still doing, thus he pass'd along. Duch. Alas, poor Richard ! where rides he the while ? York. As, in a theatre, the eyes of men, After a well-graced actor leaves the stage, Are idly bent on him that enters next, Thinking his prattle to be tedious ; Even so, or with much more contempt, men's eyes Did scowl on Richard; no man cried, God save him...
Pagina 144 - What if the sun Be centre to the world, and other stars, By his attractive virtue and their own Incited, dance about him various rounds...
Pagina 396 - And in like manner, when a ray of light falls upon the surface of any pellucid body, and is there refracted or reflected, may not waves of vibrations, or tremors, be thereby excited in the refracting or reflecting medium at the point of incidence...
Pagina 2 - As pilot well expert in perilous wave, That to a stedfast starre his course hath bent, When foggy mistes or cloudy tempests have The faithfull light of that faire lampe yblent, And cover'd heaven with hideous dreriment, Upon his card and compas firmes his eye, The maysters of his long experiment, And to them does the steddy helme apply, Bidding his winged vessell fairely forward fly...
Pagina 134 - We may also assume that the motions of these parts take the form of revolving circular currents, or vortices. By this means the matter will be collected to the centre of each vortex, while the second or subtle matter surrounds it, and by its centrifugal effort constitutes light. The planets are carried round the sun by the motion of...