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 - Science |
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Page 28
... quantity of water gradually , and tell me the appearance . Charles . The shilling rises exactly in the same proportion as you pour in the water . Tutor . Recollect then , in future , that we can- not judge of distances so well in water ...
... quantity of water gradually , and tell me the appearance . Charles . The shilling rises exactly in the same proportion as you pour in the water . Tutor . Recollect then , in future , that we can- not judge of distances so well in water ...
Page 62
... in the same manner as if the sun shone upon it . Two mirrors will reflect on it a double quantity of heat ; and if 40 or 100 mirrors could be so placed as to reflect from each the heat [ lass the tera coming from the sun , or 62 OPTICS .
... in the same manner as if the sun shone upon it . Two mirrors will reflect on it a double quantity of heat ; and if 40 or 100 mirrors could be so placed as to reflect from each the heat [ lass the tera coming from the sun , or 62 OPTICS .
Page 151
... quantity of exceedingly elastic and pene- trating fluid , which philosophers call the elec- tric fluid . Charles . You say a certain quantity : is it limited ? Tutor . Like other bodies , it undoubtedly has its limits ; this glass will ...
... quantity of exceedingly elastic and pene- trating fluid , which philosophers call the elec- tric fluid . Charles . You say a certain quantity : is it limited ? Tutor . Like other bodies , it undoubtedly has its limits ; this glass will ...
Page 152
... quantity ? Tutor . Why then , if you presented any part of your body to the table , as your knuckle , a spark would go from you to the table . James . But , perhaps , Charles might not have more than his natural share , and in that case ...
... quantity ? Tutor . Why then , if you presented any part of your body to the table , as your knuckle , a spark would go from you to the table . James . But , perhaps , Charles might not have more than his natural share , and in that case ...
Page 158
... quantities of it . By rubbing this stick of sealing - wax , I can collect a small portion if I excite or rub the glass tube , I get still more . The object , therefore , was , to find out a machine by which the largest quantities can be ...
... quantities of it . By rubbing this stick of sealing - wax , I can collect a small portion if I excite or rub the glass tube , I get still more . The object , therefore , was , to find out a machine by which the largest quantities can be ...
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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.