Of optics, magnetism, electricity and galvanismH.C. Carey & I. Lea, M'Carty & Davis, Kimber & Sharpless, Lydia R. Bailey, Benjamin & Thomas Kite, Bennett & Walton, Marot & Walter, and Anthony Finley, 1825 |
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Page 17
... hand ? Charles . Let me see : I will shoot this marble against the middle of one side of the room , from the corner of the opposite side . James . You see , instead of coming back to your hand , it goes off to the other corner , di ...
... hand ? Charles . Let me see : I will shoot this marble against the middle of one side of the room , from the corner of the opposite side . James . You see , instead of coming back to your hand , it goes off to the other corner , di ...
Page 21
... hand to within three or four inches of the window , and you see clearly the image of it . James . So I do , and the nearer the hand is to the glass , the more evident is the image , but it is formed on the other side of the glass and ...
... hand to within three or four inches of the window , and you see clearly the image of it . James . So I do , and the nearer the hand is to the glass , the more evident is the image , but it is formed on the other side of the glass and ...
Page 68
... a little care in adjust- ing your position , you will see an inverted image of yourself in the air between you and the mirror , and of a less size than you are . When you see the image , extend your hand gently 68 OPTICS .
... a little care in adjust- ing your position , you will see an inverted image of yourself in the air between you and the mirror , and of a less size than you are . When you see the image , extend your hand gently 68 OPTICS .
Page 69
... hand of the image will advance to meet it , till they both meet in the centre of the glass's concavity . If you carry your hand still farther , the hand of the image will pass by it , and come between it and the body now move your hand ...
... hand of the image will advance to meet it , till they both meet in the centre of the glass's concavity . If you carry your hand still farther , the hand of the image will pass by it , and come between it and the body now move your hand ...
Page 87
... hand to aid the sense of seeing . Children who have to learn the use of all their senses , make use of their hands in every thing ; they see nothing which they do not wish to handle , and therefore it is not improbable , that by the ...
... hand to aid the sense of seeing . Children who have to learn the use of all their senses , make use of their hands in every thing ; they see nothing which they do not wish to handle , and therefore it is not improbable , that by the ...
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Common terms and phrases
angle angle of incidence appear attract aurora borealis ball battery body brass called candle chain charge Charles coat colours concave mirror conductor CONVERSATION convex lens cylinder dark diameter direction discharge discharging-rod diverge double convex ductor earth elec electric fluid electrified electrometer equal excited experiment eye-glass figure fixed focal distance focus formed glass tube hand hole humours inches incident ray insulated inverted iron James knob Leyden jar looking-glass machine magnet magnified means metals move natural share needle nitric acid nosegay object object-glass oxidated paper parallel rays particles pass phial piece pith-balls placed Plate VII poles proceed produced quantity radius rays flow rays of light reflected rays reflecting telescope reflector refraction repel retina seen shock side silver spark spherical reflector stand Suppose surface telescope tin foil touch tricity Tutor vitreous humour Voltaic wire zinc
Popular passages
Page 155 - Leyden, of much eminence, said that " he felt himself struck in his arms, shoulders, and breast, so that he lost his breath ; and it was two days before he recovered from the effects of the blow and the terror ; adding, that he would not take a second shock for the kingdom of France.
Page 28 - Thus with the year Seasons return ; but not to me returns Day, or the sweet approach of ev'n or morn, Or sight of vernal bloom, or summer's rose, Or flocks, or herds, or human face divine ; HIS MANLY BEAUTY.
Page 28 - 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 ever-during 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 30 - Filled overflowing all those lamps of Heaven, That beam for ever through the boundless sky ; But, should he hide his face, the astonished sun, And all the extinguished stars, would loosening reel Wide from their spheres, and Chaos come again.
Page 31 - 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 76 - 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 5 - This will lead us to the explanation of one of the principal definitions in optics, viz. that the angle of reflection is always equal to the angle of incidence.
Page 39 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.
Page 75 - 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 75 - IK ; opposite to the hole r is a small mirror L, concave towards the great one ; it is fixed on a strong wire M, and may, by means of a long screw on the outside of the tube, be made to move backwards or forwards. AB is a remote object ; from which rays will flow to the great mirror D F.