Of optics, magnetism, electricity, & galvanismM. Carey, 1815 |
From inside the book
Արդյունքներ 14–ի 1-ից 5-ը:
Էջ 74
... you now , though I shall not explain it at present , that the rainbow in the heavens is caused by the separation of the rays of light into their component parts . Charles . And was that the cause of the colours 74 OPTICS .
... you now , though I shall not explain it at present , that the rainbow in the heavens is caused by the separation of the rays of light into their component parts . Charles . And was that the cause of the colours 74 OPTICS .
Էջ 212
... present case , attempt to say what the electrical fluid is : its action is well known ; it seems diffused over every portion of matter with which we are acquainted , and , by the use of pro- per methods , it is as easily collected from ...
... present case , attempt to say what the electrical fluid is : its action is well known ; it seems diffused over every portion of matter with which we are acquainted , and , by the use of pro- per methods , it is as easily collected from ...
Էջ 219
... present it to these fragments of paper , thread , and gold - leaf : you see they all move to it . That is called electrical attrac- tion . Charles . They jump back again now , and now they return to the glass . Tutor . They are , in ...
... present it to these fragments of paper , thread , and gold - leaf : you see they all move to it . That is called electrical attrac- tion . Charles . They jump back again now , and now they return to the glass . Tutor . They are , in ...
Էջ 222
... near the extremity , are some small substances , as bits of paper , & c . I will excite the glass tube , and present it to the upper part of the poker . Charles . They are all attracted but now you take 222 ELECTRICITY .
... near the extremity , are some small substances , as bits of paper , & c . I will excite the glass tube , and present it to the upper part of the poker . Charles . They are all attracted but now you take 222 ELECTRICITY .
Էջ 236
... present position , but stand on the stool with glass legs ; by which means there is now all communica- tion cut off between the cushion and the earth ; in other words , the cushion is com- pletely insulated , and can only take from you ...
... present position , but stand on the stool with glass legs ; by which means there is now all communica- tion cut off between the cushion and the earth ; in other words , the cushion is com- pletely insulated , and can only take from you ...
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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...