Cyclopadic Science SimplifiedF. Warne and Company, 1869 - 685 pages |
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Page 16
... means of photometry . The lamp having the reservoir of spirit thus arranged , the platinum wires parallel , and their projecting ends level , a light is applied , and the flame instantly appears , forming a perfectly shaped cone 125 in ...
... means of photometry . The lamp having the reservoir of spirit thus arranged , the platinum wires parallel , and their projecting ends level , a light is applied , and the flame instantly appears , forming a perfectly shaped cone 125 in ...
Page 38
... means plane ; their general surface is slightly convex ; there is a hollow in the centre and a projection in the position of the inscrip- tion behind , caused no doubt by the blow necessary in stamping it . The polish is probably given ...
... means plane ; their general surface is slightly convex ; there is a hollow in the centre and a projection in the position of the inscrip- tion behind , caused no doubt by the blow necessary in stamping it . The polish is probably given ...
Page 59
... means of two other plano - convex lenses ; the flat side of one lens being to- wards the picture , and the convex side towards the flat side of the second lens . The focusing lenses are contained in a tube which slides within the other ...
... means of two other plano - convex lenses ; the flat side of one lens being to- wards the picture , and the convex side towards the flat side of the second lens . The focusing lenses are contained in a tube which slides within the other ...
Page 66
... mean index From vitreous to crystalline , outer coat From to 11 • using the mean index . 1'0466 10353 1'0445 1.0332 The eye , as already described , consists of four coats or membranes , which are disposed in the following order , viz ...
... mean index From vitreous to crystalline , outer coat From to 11 • using the mean index . 1'0466 10353 1'0445 1.0332 The eye , as already described , consists of four coats or membranes , which are disposed in the following order , viz ...
Page 86
... means employed by Sir Isaac Newton , nearly two hundred years ago , to effect the same object — viz . , the decomposition of light . The great discovery made by Newton , about the year 1672 , that light is not of a simple but of a ...
... means employed by Sir Isaac Newton , nearly two hundred years ago , to effect the same object — viz . , the decomposition of light . The great discovery made by Newton , about the year 1672 , that light is not of a simple but of a ...
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Common terms and phrases
action air-pump apparatus arrangement Atomic weight ball barometer battery bismuth body brass called carbon cause charcoal charge chemical chloride circuit coating coil colour condensed conductor connected containing copper crystal cylinder decomposed described diameter direction disc discharge effect electric current electro-magnet electroscope equal experiments Faraday flame fluid force galvanometer gases glass gold gun cotton heat hydrogen inch induction instrument insulated iron latter length Leyden jar light lines magnetic mercury metal mirror motion needle nitric acid obtained ordinary oxide oxygen paper particles pass phosphorus piece piston placed plate platinum polarized pole Polytechnic position pressure produced pump quantity rays refraction resistance rheostat salt screw shown silver Sir Charles Wheatstone solution sound spark specific gravity spectrum steam string substance sulphate sulphuric acid surface telegraph temperature thermometer tinfoil tion tricity tube valve vapour velocity vessel vibrations voltaic weight wheel whilst wire zinc
Popular passages
Page 391 - Farewell, a long farewell, to all my greatness ! This is the state of man ; to-day he puts forth The tender leaves of hope, to-morrow blossoms, And bears his blushing honours thick upon him : The third day comes a frost, a killing frost ; And,— when he thinks, good easy man, full surely His greatness is a ripening, — nips his root, And then he falls, as I do.
Page 159 - I have seen the wild stone-avalanches of the Alps, which smoke and thunder down the declivities with a vehemence almost sufficient to stun the observer. I have also seen snow-flakes descending so softly as not to hurt the fragile spangles of which they were composed ; yet to produce, from aqueous...
Page 139 - ... the particles move round their own axes, and separate from each other, penetrating in right lines through space. Temperature may be conceived to depend upon the velocities of the vibrations; increase of capacity on the motion being performed in greater space; and the diminution of temperature, during the conversion of solids into fluids or gases, may be explained on the idea of the loss of vibratory motion, in consequence of the revolution of particles round their axes, at the moment when the...
Page 139 - It seems possible to account for all the phenomena of heat, if it be supposed that in solids the particles are in a constant state of vibratory motion, the particles of the hottest bodies moving with the greatest velocity...
Page 314 - I endeavoured upon this law to construct an instrument which should measure out the electricity passing through it, and which, being interposed in the course of the current used in any particular experiment, should serve at pleasure, either as a comparative standard of effect, or as a positive measurer of this subtile agent.
Page 311 - On the absolute Quantity of Electricity associated with the Particles or Atoms of matter...
Page 312 - THE theory which I believe to be a true expression of the facts of electro-chemical decomposition, and which I have therefore detailed in a former series of these Researches, is so much at variance with those previously advanced, that I find the greatest difficulty in stating results, as I think, correctly, whilst limited to the use of terms which are current with a certain accepted meaning. Of this kind is the term pole, with its prefixes of positive and negative, and the attached ideas of attraction...
Page 313 - I propose to distinguish these bodies by calling those anions\ which go to the anode of the decomposing body ; and those passing to the cathode, cations^ ' and when I have occasion to speak of these together, I shall call them ions.
Page 318 - In further proof of this high electric condition of the particles of matter, and the identity as to quantity of that belonging to them with that necessary for their separation...
Page 139 - ... and elastic fluids, besides the vibratory motion, which must be conceived greatest in the last, the particles have a motion round their own axes, with different velocities, the particles of elastic fluids moving with the greatest quickness : and that in ethereal substances the particles move round their own axes, and separate from each other, penetrating in right lines through space.