Of optics, magnetism, electricity, & galvanismM. Carey, 1815 - Science |
From inside the book
Results 1-5 of 32
Page 38
... silver fish , I thought them very large ; but if I looked down upon them from the top , they appear much smaller indeed . Tutor . Here the convex or round shape of the glass becomes a magnifier , the reason of which will be explained ...
... silver fish , I thought them very large ; but if I looked down upon them from the top , they appear much smaller indeed . Tutor . Here the convex or round shape of the glass becomes a magnifier , the reason of which will be explained ...
Page 83
... silver- ed on one side ; they are also made of high- ly polished metal . There are three kinds of mirrors , the plain , the convex , and the concave . Charles . You have shown us that in a booking - glass or plain mirror , " The angle ...
... silver- ed on one side ; they are also made of high- ly polished metal . There are three kinds of mirrors , the plain , the convex , and the concave . Charles . You have shown us that in a booking - glass or plain mirror , " The angle ...
Page 137
... silver hairs of day . James . But how is the light which is admitted by a circular hole in the window spread out into an oblong ? Tutor . If the ray were of one substance , it would be equally bent upwards , and make only a small ...
... silver hairs of day . James . But how is the light which is admitted by a circular hole in the window spread out into an oblong ? Tutor . If the ray were of one substance , it would be equally bent upwards , and make only a small ...
Page 149
... silver penny for instance , appear a hundred times larger through this telescope than it would by the naked eye ? Tutor . Telescopes , in general , represent terrestrial objects to be nearer and not lar- ger : thus looking at the silver ...
... silver penny for instance , appear a hundred times larger through this telescope than it would by the naked eye ? Tutor . Telescopes , in general , represent terrestrial objects to be nearer and not lar- ger : thus looking at the silver ...
Page 150
Jeremiah Joyce. ger : thus looking at the silver penny a hundred yards distant , it will not appear to be larger , but at the distance only of a sin- gle yard . James . Is there no advantage gained , if the focal distance of the eye ...
Jeremiah Joyce. ger : thus looking at the silver penny a hundred yards distant , it will not appear to be larger , but at the distance only of a sin- gle yard . James . Is there no advantage gained , if the focal distance of the eye ...
Other editions - View all
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
Popular passages
Page 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.
Page 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.
Page 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...
Page 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.
Page 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.
Page 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.
Page 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.
Page 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...
Page 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.
Page 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...