Of optics, magnetism, electricity, & galvanismM. Carey, 1815 |
From inside the book
Արդյունքներ 59–ի 1-ից 5-ը:
Էջ 7
... seen that it was quite impossi- ble to include in the three volumes the in- troduction to chymistry , as it was originally intended . This branch of science is become so very interesting , and the study of it so general , that it would ...
... seen that it was quite impossi- ble to include in the three volumes the in- troduction to chymistry , as it was originally intended . This branch of science is become so very interesting , and the study of it so general , that it would ...
Էջ 11
... seen that it was quite impossi- ble to include in the three volumes the in- troduction to chymistry , as it was originally intended . This branch of science is become so very interesting , and the study of it so general , that it would ...
... seen that it was quite impossi- ble to include in the three volumes the in- troduction to chymistry , as it was originally intended . This branch of science is become so very interesting , and the study of it so general , that it would ...
Էջ 15
... seen all 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 ...
... seen all 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 ...
Էջ 17
... seen through it , which proves that light will move only in a straight line . This is plain also from the shadows which opaque bodies cast ; for if the light did not describe straight lines , there would be no shadow . Hold any object ...
... seen through it , which proves that light will move only in a straight line . This is plain also from the shadows which opaque bodies cast ; for if the light did not describe straight lines , there would be no shadow . Hold any object ...
Էջ 31
... going to tell you , for it is a sort of axiom in optics : " We see every thing in the direction of that line in which the rays approach us last . ” Which may be thus illustrated : I place a candle OBJECTS HOW SEEN . 31.
... going to tell you , for it is a sort of axiom in optics : " We see every thing in the direction of that line in which the rays approach us last . ” Which may be thus illustrated : I place a candle OBJECTS HOW SEEN . 31.
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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...