The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1879 - English periodicals |
Contents
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Common terms and phrases
acid action æther affinity amount angle aperture apparatus appears atomic weight axis birefringent body boiling-point cadmium calculated carbon centimetre centims centre chemical chloride circuit coefficient coil colour compounds connexion constant copper corresponding curve deflection deflexion determined diameter direction disk distance earthquake effect electric electromotive force elements energy equal equation experiments flashing bands formula galvanometer give glass greater heat homologous series horizontal Hydrochloric acid inches increases influence intensity iron wire latter light liquid magnetic mass means measured melting-point metals method millims molecular molecules motion nitrobenzol observed obtained optical oxide Phil pile plane plate platinum Pogg polariscope pole position prism produced proportional quantity radiation rays refractive represented resistance rods rotation shown Siemens units solution sound specific gravity spectrum steel sulphate sulphuric acid surface Table temperature theory thick tion tube velocity vertical vibration volume zinc
Popular passages
Page 51 - Daniell's battery. In order to have a perfect induction-currents balance suitable for physical research, all its coils as well as the size and amount of wire should be equal. The primary coils a, a', and the secondary coils b, I/, should be separated and not superposed.
Page 576 - THE ANNALS AND MAGAZINE OF NATURAL HISTORY, INCLUDING ZOOLOGY, BOTANY, AND GEOLOGY. MONTHLY, PRICE 2s.
Page 229 - Magazine that as the power of a telescope is measured by the closeness of the double stars which it can resolve, so the power of a spectroscope ought to be measured by the closeness of the closest double lines in the spectrum which it is competent to resolve.
Page 30 - There is every reason to consider it established, that an earthquake is simply " the transit of a wave or waves of elastic compression in any direction, from vertically upwards to horizontally in any azimuth, through the crust and surface of the earth, from any centre of impulse or from more than one, and which may be attended with sound and tidal waves, dependent upon the impulse and upon circumstances of position as to sea and land.
Page 246 - ARAGO'S method of producing rotation in a copper disk consists of suspending it by its centre so as to make it lie horizontally above the poles of a horseshoe magnet, and then rotating the magnet about a vertical axis. The rotation of the disk is due to that of the magnetic field in which it is suspended; and we should expect that if a similar motion of the field could be produced by any other means, the result would be a similar motion of the disk. Possibly the rotation of the magnet may be the...
Page 386 - For all vapours , when they begin to condense and coalesce into small parcels , become first of that bignefs, whereby such an azure must be reflected, before they can constitute clouds of other colours. And so, this being the first colour, which vapours begin to reflect, it ought to be the colour of the finest and most transparent skies, in which vapours are not arived to that grofsnefs requisite to reflect other colours, äs we find it is by experience.
Page 119 - I would therefore venture to hope that an attempt to delineate nature in all its vivid animation and exalted grandeur, and to trace the stable amid the vacillating ever-recurring alternation of physical metamorphoses, will not be wholly disregarded at a future age.
Page 50 - Immediately upon the announcement of Arago's discovery of the influence of rotating plates of metal upon a magnetic needle (1824), and Faraday's important discovery of voltaic and magneto-induction (1831), it became evident that the induced currents, circulating in a metallic mass, might be so acted upon either by voltaic or induced currents as to bring some new light to bear on the molecular construction of metallic bodies. The question was particularly studied by Bahbage, Sir John Herschel, and...
Page 266 - Mendeleeff, that we owe a new field of research and a new and powerful method of attacking chemical problems.... The principle proposed... will serve in the future and has done to some extent already, to indicate those directions in which research is most needed and in which there is most promise of interesting results It is and will be, in fact, for some time to come, the finger-post of chemical science.
Page 232 - ... with this subject. Hitherto, in descriptions of spectroscopes, far too much stress has been laid upon the amount of dispersion produced by the prisms. But this element by itself tells nothing as to the power of an instrument. It is well known that by a sufficiently...