## Philosophical MagazineTaylor & Francis., 1885 - Physics |

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Page 410

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**equations**. This is not so easy as it may appear . General considerations may lead us to the conclusion that the**equation**to the wave - surface and that to the index - surface may be turned one into the other by the simple process of ...Page 412

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**equation**( 63 ) . Up to**equation**( 59 ) the work is plain and straightforward , according to rule in fact , being merely the elimination of the differentials , and the getting of an**equation**between p and σ . What to do next is not at ...Page 413

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**equation**from VNH = -E , VNE = υμΗ , . • ( 25 ) bis ( 26 ) bis we must have two corresponding**equations**for one ray- direction . Let M be a unit vector defining the direction of the ray , and w be the ray - velocity , so that p = wM ...### Contents

FIFTH SERIES | 1 |

30 | 8 |

Prof W N Hartley on the Influence of Atomic Arrangement | 61 |

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acid æther ampere average axis Ayrton and Perry bromide cadmium calculated cells chemical action chemical affinity chloride circuit coil condenser conductor connected contact-force copper corresponding curve Daniell cell deflection determined difference of potential direction effect electric electrolytes electromotive force energy equation experimental experiments film formula galvanometer give given H₂O heats of formation Hence hydrogen immersed increase induction iodide iron Julius Thomsen junction lamp lines of force liquid magma magnetic force magnetic moment maximum means measured mercury metals method millim molecular molecules motion negative observed obtained oxidation oxygen paper Pellat Peltier Peltier effect Phil plane plates platinum polarization positive Probable error produced Prof quantity resistance rotation salt silver silver chloride solution solution-strength strip sulphate surface suspended temperature theory thermoelectric thermovoltaic constant thickness Thomson tion tube vector velocity volt Volta effect voltaic constant volts wire