Cyclopædic Science simplified ... With ... illustrations |
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Page 1
... WHOLE UNIVERSE . ABOUT two hundred years ago Descartes , Hook , and Huygens , three of the most celebrated mathematicians of their day , entertained the idea that light was propagated by the vibrations and undulations of a subtile ...
... WHOLE UNIVERSE . ABOUT two hundred years ago Descartes , Hook , and Huygens , three of the most celebrated mathematicians of their day , entertained the idea that light was propagated by the vibrations and undulations of a subtile ...
Page 3
... disc of aluminum 8 in .; m , base containing the multiplying gear ; sss , air - tight glass receiver , 15 in . diameter and 16 in . high , covering the whole . in the article on Electricity in this work ) . 1-2 ON LIGHT . 3.
... disc of aluminum 8 in .; m , base containing the multiplying gear ; sss , air - tight glass receiver , 15 in . diameter and 16 in . high , covering the whole . in the article on Electricity in this work ) . 1-2 ON LIGHT . 3.
Page 19
... whole length being a little over 4 ft . , each light can be placed at a distance of 24 in . from the disc . The flame is then sheltered from currents of air by black screens placed round , and the light to be compared is fixed in a ...
... whole length being a little over 4 ft . , each light can be placed at a distance of 24 in . from the disc . The flame is then sheltered from currents of air by black screens placed round , and the light to be compared is fixed in a ...
Page 45
... whole rest until the pitch is cold . To clean the Speculum . - Place the speculum , cemented to the circular block , face upwards , on a level table ; pour on it a small quantity of strong nitric acid , and rub it gently all over the ...
... whole rest until the pitch is cold . To clean the Speculum . - Place the speculum , cemented to the circular block , face upwards , on a level table ; pour on it a small quantity of strong nitric acid , and rub it gently all over the ...
Page 57
... whole apparatus and the building to which it was attached were most carefully made and adjusted to each other . FIG . 67 . Fig . 67 represents a dome or cupola placed over a room erected for the purpose of a camera obscura . The whole ...
... whole apparatus and the building to which it was attached were most carefully made and adjusted to each other . FIG . 67 . Fig . 67 represents a dome or cupola placed over a room erected for the purpose of a camera obscura . The whole ...
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acid action air-pump angle apertures apparatus arrangement axis ball barometer battery bismuth body boiling brass called carbon cause charged chemical circuit coating coil colours condensing conductor connected constructed copper cylinder described diameter direction disc discharge dry pile effect elec electric current electrical machine electro-magnet electroscope engine equal experiments flame fluid force galvanometer gases glass heat hydrogen inch induction instrument insulated iron latent heat latter length lens Leyden jar light lines magnetic mercury metal mirror motion needle observed obtained paper particles pass piece piston placed plate platinum polarized pole Polytechnic position pressure prism produced pump quantity rays reflected refraction resistance rheostat screw shellac shown side silver Sir Charles Wheatstone sound spark spectrum steam string substance sulphuric acid surface telegraph temperature thermometer tinfoil tion tourmaline tricity tube valve vapour velocity vessel vibrations voltaic wheel whilst wire zinc