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Page 202
... dry and found on the summit of lofty mountains . The dry air allows the obscure heat- waves to travel through , and ... pile of Melloni . " The spectrum was formed by means of lenses and prisms of rock - salt ; it was equal in width to the ...
... dry and found on the summit of lofty mountains . The dry air allows the obscure heat- waves to travel through , and ... pile of Melloni . " The spectrum was formed by means of lenses and prisms of rock - salt ; it was equal in width to the ...
Page 218
... dry pile . The dry pile is , however , useless if allowed really to become dry ; it has been found that , when the moisture naturally present in all paper is thoroughly removed , the action of the dry pile diminishes and almost ceases ...
... dry pile . The dry pile is , however , useless if allowed really to become dry ; it has been found that , when the moisture naturally present in all paper is thoroughly removed , the action of the dry pile diminishes and almost ceases ...
Page 219
... dry pile is attached to the electroscope of Hare by sub- stituting the poles of two of De Luc's columns for the gilt disc ( Fig . 193 , p . 212 ) , the instrument is made wonderfully delicate , so much so that Mr. Sturgeon describes an ...
... dry pile is attached to the electroscope of Hare by sub- stituting the poles of two of De Luc's columns for the gilt disc ( Fig . 193 , p . 212 ) , the instrument is made wonderfully delicate , so much so that Mr. Sturgeon describes an ...
Page 220
... dry pile . ELECTRICAL MACHINES . In the year 1777 , Tiberius Cavallo , a thoroughly practical and learned elec- trician , describes , in his " Complete Treatise on Electricity , " the construction of the cylinder electrical machine of ...
... dry pile . ELECTRICAL MACHINES . In the year 1777 , Tiberius Cavallo , a thoroughly practical and learned elec- trician , describes , in his " Complete Treatise on Electricity , " the construction of the cylinder electrical machine of ...
Page 245
... pile . When this experiment is made , care must be taken that the zinc plate ... dry as possible , or at least the electroscope and all the pieces of which ... dryness . " Space does not permit us to describe Peclet's instrument , which ...
... pile . When this experiment is made , care must be taken that the zinc plate ... dry as possible , or at least the electroscope and all the pieces of which ... dryness . " Space does not permit us to describe Peclet's instrument , which ...
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Common terms and phrases
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