## Philosophical MagazineTaylor & Francis., 1870 - Physics |

### Contents

FOURTH SERIES | 1 |

Mr J A Phillipss Note on certain Slates Felsites and Elvan | 12 |

Prof Challis on a Mathematical Theory of Tides | 19 |

Tomlinson on the Motions of certain Liquids on the Sur | 42 |

The Rev T K Abbotts Note on some Propositions in | 49 |

Mr J N Lockyers Reply to some Remarks of Father Secchi | 61 |

On the Laws of Induction By MM Jamin and Roger | 73 |

Mr J Croll on Oceancurrents Part I Oceancurrents | 81 |

Prof Challis on a new discussion of the Mathematical Theory | 260 |

Prof Hows Contributions to the Mineralogy of Nova Scotia | 275 |

Prof F Guthrie on1 | 282 |

The Rev J M Heath on the Circumstances which determine | 288 |

Mr J P Harrison on Solar Radiation in connexion with Cloud | 299 |

Proceedings of the Geological Society | 313 |

F J Pictet on the present state of the question as to | 321 |

Prof J C Draper on an Improvement in Filtration | 335 |

Prof R S Balls Note on an Elementary Proof of a Theorem | 107 |

F Kohlrauschs Determination of the Absolute Horizontal | 114 |

Mr W H Walenns Remarks on the Atomic Theory | 122 |

Proceedings of the Royal Society | 149 |

107 | 151 |

On Auroral Appearances and their connexion with the Pheno | 159 |

Mr T T P B Warrens Notes on Professor Fleeming Jenkins | 169 |

Mr E L Garbett on Popular Difficulties in Tide Theory | 175 |

Prof Reusch on Micacombinations | 196 |

Dr W J M Rankine on the Thermal Energy of Molecular | 211 |

A De la Rive on the Organic Dust of the Air | 229 |

On a possible Cause of the Gulfstream by Robert Gill Esq | 238 |

Dr W M Wattss Note on the Temperature and Heating | 242 |

Mr R Moon on the Structure of the Human Ear and on | 248 |

powers of Flames | 337 |

Mr J Dewars Note on Inverted Sugar | 345 |

Captain A R Clarke on the Course of Geodesic Lines on | 352 |

Mr T S Aldis on Goodrickes Theory of Algol | 363 |

A Wüllner on the Spectra of some Gases under High Pres | 370 |

Proceedings of the Geological Society | 383 |

On the Diathermancy of a Series of Substances for Obscure | 396 |

Mr A S Davis on a Theory of Nebula and Comets | 402 |

J Thomsens Thermochemical Researches | 410 |

The Rev J M Heath on Thermodynamics | 421 |

The Rev Prof Challiss Supplement to a Mathematical Theory | 435 |

The late Prof G Magnus on the Change in the Radiation | 445 |

On the Inexpediency of Erroneous Hypotheses by Charles | 465 |

Physical Notices by J Müller | 467 |