The Family Library (Harper)., Volum 261845 |
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Side 76
... centre of the object - glass where it touched the plane surface , to a considerable thickness at the circumference of the lens . When light was allowed to fall upon the object - glass , every different thickness of the plate of air ...
... centre of the object - glass where it touched the plane surface , to a considerable thickness at the circumference of the lens . When light was allowed to fall upon the object - glass , every different thickness of the plate of air ...
Side 77
... centre at E , and the luminous rings will now correspond with those which were dark when seen by reflection , as will be readily understood from in- specting the preceding diagram . When the object - glasses are illuminated by white ...
... centre at E , and the luminous rings will now correspond with those which were dark when seen by reflection , as will be readily understood from in- specting the preceding diagram . When the object - glasses are illuminated by white ...
Side 78
... centre E , are as follows : - 1st Order . Black , blue , white , yellow , orange , red . 2d Order . Violet , blue , green , yellow , orange , red . 3d Order . Purple , blue , green , yellow , red , bluish- red . 4th Order . Bluish ...
... centre E , are as follows : - 1st Order . Black , blue , white , yellow , orange , red . 2d Order . Violet , blue , green , yellow , orange , red . 3d Order . Purple , blue , green , yellow , red , bluish- red . 4th Order . Bluish ...
Side 105
... centre of divergence ; but if we intercept a portion of such a beam by an opaque body , the repulsive force of the light which formerly occupied its shadow is with- drawn , and consequently the rays which pass near the body will be ...
... centre of divergence ; but if we intercept a portion of such a beam by an opaque body , the repulsive force of the light which formerly occupied its shadow is with- drawn , and consequently the rays which pass near the body will be ...
Side 113
... centre ; and with the system of Apollonius Pergæus , who made all the planets re- volve round the sun , while the sun and moon were carried round the earth in the centre of the universe . The examination , however , of these hypotheses ...
... centre ; and with the system of Apollonius Pergæus , who made all the planets re- volve round the sun , while the sun and moon were carried round the earth in the centre of the universe . The examination , however , of these hypotheses ...
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Vanlige uttrykk og setninger
Abbé Conti appear astronomical attraction Bentley Biot blue bodies calculus Cambridge cause centre colours Colsterworth comets Commercium consequence considered curves dated degree Descartes differential calculus discoveries distance doctrine earth edition experiment Flamstead force fringes Galileo genius glass gravity Halley heat Hipparchus honour Hooke Huygens infinite inquiries invention James Gregory John Newton Keill Kepler labours Leibnitz letter London manuscript mathematical ment method of fluxions mind moon motion nature never Newtonian philosophy observations Oldenburg opinion Optics orbit papers particles of light Pepys phenomena philosopher planets possession Principia principles prism produced published quadrature rays received reflecting telescope refrangibility remarkable Royal Society scholium seems Sir Isaac Newton space spectrum speculum stars supposed surface theory thickness thin plates thought tion tonian transmitted Trinity College truth Tycho Tycho Brahe views violet Whiston white light Woolsthorpe yellow
Populære avsnitt
Side 300 - 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 sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.
Side 139 - I only hint at present to such as have ability and opportunity of prosecuting this inquiry, and are not wanting of industry for observing and calculating, wishing heartily such may be found, having myself many other things in hand, which I would first complete, and therefore cannot so well attend it. But this I...
Side 78 - ... that the ratio of the sines of the angles of incidence and refraction is constant for refraction in the same medium, was effected by Snell and Descartes.
Side 217 - I could not have believed what you tell me of yourself, had I had it from any body else. And though I cannot but be mightily troubled that you should have had so many wrong and unjust thoughts of me...
Side 149 - The third 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.
Side 216 - I desire you to forgive me this uncharitableness. For I am now satisfied that what you have done is just, and I beg your pardon for my having hard thoughts of you for it, and for representing that you struck at the root of morality, in a principle you laid down in your book of ideas, and designed to pursue in another book, and that I took you for a Hobbist.
Side 149 - I must again beg you," says he, "not to let your resentments run so "high as to deprive us of your third book, wherein your applications of your mathematical doctrine to the theory of comets, and several curious experiments, which, as I guess by what you write ought to compose it, will undoubtedly render it acceptable to those who will call themselves philosophers without mathematics, which are much the greater number.
Side 256 - WHEN I wrote my treatise about our system, I had an eye upon such principles as might work with considering men for the belief of a Deity ; and nothing can rejoice me more than to find it useful for that purpose.
Side 320 - I WAS on Sunday night, the 7th of March, 1724-5, at Kensington with Sir Isaac Newton, in his lodgings, just after he was come out of a fit of the gout, which he had had in both his feet, for the first time, in the eighty-third year of his age. He was better after it, and his head clearer, and memory stronger than I had known them for some time.
Side 282 - I found that, as often as I went into the dark, and intended my mind upon them, as when a man looks earnestly to see anything which is difficult to be seen, I could make the phantasm return without looking any more upon the sun; and the oftener I made it return, the more easily I could make it return again.