Cyclopædic Science simplified ... With ... illustrations |
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Page 3
... needle ( an instrument which is described and figured A C b FIG . I. FIG . 2 . a , Figs . 1 and 2 , thermo - electric pile with reflecting cone attached ; at , height 6 in . from bed - plate ; a length of cone , & c . , 5 in .; ed ...
... needle ( an instrument which is described and figured A C b FIG . I. FIG . 2 . a , Figs . 1 and 2 , thermo - electric pile with reflecting cone attached ; at , height 6 in . from bed - plate ; a length of cone , & c . , 5 in .; ed ...
Page 34
... needles . If glass be used , it should always be broken from coloured glass rods with the hammer , in order to secure the conchoidal fracture , as the wedge - shaped figures give gradual tones of colour , which are very pleasing to the ...
... needles . If glass be used , it should always be broken from coloured glass rods with the hammer , in order to secure the conchoidal fracture , as the wedge - shaped figures give gradual tones of colour , which are very pleasing to the ...
Page 76
... needle two or three inches apart , revolving them between the fingers , and looking at them in the right direction against a dark or black ground : the greater the velocity of the wheels , the more perfect will be the appear- ance ...
... needle two or three inches apart , revolving them between the fingers , and looking at them in the right direction against a dark or black ground : the greater the velocity of the wheels , the more perfect will be the appear- ance ...
Page 79
... needle run through both and then withdrawn . These wheels could at any time be put upon the axes , and , being held sufficiently firm by the friction of the cork , turned with them . By these arrangements the axes could be changed , or ...
... needle run through both and then withdrawn . These wheels could at any time be put upon the axes , and , being held sufficiently firm by the friction of the cork , turned with them . By these arrangements the axes could be changed , or ...
Page 82
... needles produce the effect very well in diffused daylight ; and the line produced by the shadow of one on the other , and that belonging to the intersection , are easily dis- tinguished and separated . " If whilst a single bar is moved ...
... needles produce the effect very well in diffused daylight ; and the line produced by the shadow of one on the other , and that belonging to the intersection , are easily dis- tinguished and separated . " If whilst a single bar is moved ...
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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