Of optics, magnetism, electricity, & galvanismM. Carey, 1815 |
From inside the book
Արդյունքներ 26–ի 1-ից 5-ը:
Էջ 15
... round for the space of half a mile in other words , there is no place within a sphere of a mile in diameter , where the candle cannot be seen , that is , where some of the rays from the small flame will not be found . : James . Why do ...
... round for the space of half a mile in other words , there is no place within a sphere of a mile in diameter , where the candle cannot be seen , that is , where some of the rays from the small flame will not be found . : James . Why do ...
Էջ 20
... round , to a consi- derable distance , now if you or I happen to be near it , the particles which fall upon certain nerves in the nose will excite in us those sensations , by which we say we have the smell of musk . In the same way par ...
... round , to a consi- derable distance , now if you or I happen to be near it , the particles which fall upon certain nerves in the nose will excite in us those sensations , by which we say we have the smell of musk . In the same way par ...
Էջ 38
... round shape of the glass becomes a magnifier , the reason of which will be explained hereafter . A fish will , however , look larger in water than it really is . - I will show you another experiment which depends on refraction : here is ...
... round shape of the glass becomes a magnifier , the reason of which will be explained hereafter . A fish will , however , look larger in water than it really is . - I will show you another experiment which depends on refraction : here is ...
Էջ 40
... rounded with an atmosphere which ex- tends all round the earth , and above it about the height of forty - five miles ; now the dotted part of Fig . 5. represents that atmosphere : suppose a spectator stand at 8 , and the sun be at a ...
... rounded with an atmosphere which ex- tends all round the earth , and above it about the height of forty - five miles ; now the dotted part of Fig . 5. represents that atmosphere : suppose a spectator stand at 8 , and the sun be at a ...
Էջ 74
... round with great velocity , the whole will appear of a dirty white , and if the colours were more perfect the white would be so too . James . Was it then owing to the se- paration of the different rays , that I saw the rainbow colours ...
... round with great velocity , the whole will appear of a dirty white , and if the colours were more perfect the white would be so too . James . Was it then owing to the se- paration of the different rays , that I saw the rainbow colours ...
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Common terms and phrases
acid angle animals appear attract aurora borealis ball battery body brass bring called candle chain charge Charles colours concave lens concave mirror conducting substance conductor CONVERSATION convex lens copper cylinder diameter discharge diverge ductor earth effect elec electric fluid electrified electrometer excited experiment eye-glass fixed focal distance focus Galvanism glass tube gold gymnotus hand hold humours inches insulated inverted iron James knob knuckle Leyden jar looking-glass magnet magnifying means metals motion natural share needle negative nerve nitric acid object object-glass oxidation paper pass phial piece of silver piece of zinc pith-balls Plate VIII poles position produced quantity rays of light reflected Refracting telescopes refraction repel retina rubber rubbing seen shock side south pole spark stand surface telescope tin foil tion touch tric fluid tricity Tutor Voltaism wire zinc
Սիրված հատվածներ
Էջ 54 - Thus with the year Seasons return ; but not to me returns Day, or the sweet approach of even or morn, Or sight of vernal bloom, or summer's rose, Or flocks, or herds, or human face divine ; But cloud instead, and everduring dark Surrounds me, from the cheerful ways of men Cut off, and for the book of knowledge fair Presented with a universal blank Of nature's works, to me expunged and rased, And wisdom at one entrance quite shut out.
Էջ 121 - Meantime, refracted from yon eastern cloud, Bestriding earth, the grand ethereal bow Shoots up immense; and every hue unfolds, In fair proportion, running from the red To where the violet fades into the sky.
Էջ 77 - Since c 6 is perpendicular to the glass at *), the angle of incidence is abc ; and as the angle of reflection is always equal to the angle of incidence...
Էջ 11 - How distant some of these nocturnal suns ! So distant (says the sage) 'twere not absurd To doubt if beams, set out at Nature's birth, Are yet arrived at this so foreign world, Though nothing half so rapid as their flight.
Էջ 33 - A lens is glass ground into such a form, as to collect or disperse the rays of light which pass through it. These are of different shapes, and from thence receive different names.
Էջ 287 - As he was sitting with a friend in the open air, an hour after sun-set, they saw a falling, or as it is sometimes called, a shooting star, directing its course towards them, growing apparently larger and larger, till it disappeared not far from them, and, disappearing, it left their faces, hands, and clothes, with the earth, and neighbouring objects, suddenly illuminated with a diffused and lambent light, attended with no noise at all.
Էջ 129 - Yes ; the three glasses next the eye having their focal distances equal, the magnifying power is found by dividing the focal distance of the object-glass by the focal distance of one of the eye-glasses.
Էջ 58 - First the flaming red Sprung vivid forth; the tawny orange next; And next delicious yellow; by whose side Fell the kind beams of all-refreshing green. Then the pure blue, that swells autumnal skies, Ethereal...
Էջ 291 - Even in the depth of polar night, they find A wondrous day; enough to light the chase, Or guide their daring steps to Finland fairs.
Էջ 121 - Shoots up immense ; and every hue unfolds, In fair proportion running from the red, To where the violet fades into the sky. Here, awful Newton, the dissolving clouds Form, fronting on the sun, thy showery...