IV CONTENTS OF VOL. XXIV. — THIRD SERIES. 



l'age 

 Mr. Herbert Spencer's Remarks upon the Theory of Reciprocal 

 Dependence in the Animal and Vegetable Creations, as regards 



its bearing upon Palaeontology 90 



The Rev. J. Challis on a particular case of the Application of 



Criteria of Integrability 



Mr. R. Hunt on the Influence of Light on Plants . 96 



Dr. Kane's Abstract of a Memoir on the Chemical Constitution 

 of the Plants of Flax and Hemp, considered with relation to 



the conditions of their Growth and Preparation 98 



Mr. A. Connell's Chemical Examination of the Tagua Nut, or 



Vegetable Ivory • 104 



Mr. J. P. Joule on the Intermittent Character of the Voltaic 

 Current in certain cases of Electrolysis ; and on the Intensi- 

 ties of various Voltaic Arrangements 106 



Dr. A. W. Hofman's Chemical Investigation of the Organic 



Bases contained in Coal- Gas Naphtha 115 



Dr. Stenhouse on the Products of the Distillation of Meconic 



Acid ; 1^8 



Dr. Faraday's speculation touching Electric Conduction and the 



. Nature of Matter I 36 



Proceedings of the Geological Society 144 



Detonation of the Alloy of Potassium and Antimony 153 



On the Chemical Constitution of Wolfram, by M. Marguerite. 153 

 Analysis of Ancient and Fossil Bones, by MM. Girardin and 



Preisser 154 



On Apiin, by Mons. H. Braconnot 155 



On Sulphocamphoric Acid, by M. Philippe Walter 157 



Meteorological Observations for December 1843 159 



Table 160 



NUMBER CLVIII.— MARCH. 



Mr. A. Connell's Further Observations on the Voltaic Decom- 

 position of Solutions 161 



Mr. E. W. Binney on the remarkable Fossil Trees lately disco- 

 vered near St. Helen's 165 



Mr. J. Goodman on the Cause of Dissimilarity in the Pheno- 

 mena of the Ordinary and Voltaic Electric Fluids 174 



Mr. W. J. Henwood on the (Displacements) Heaves of Metal- 

 liferous Veins by Cross-veins. (Part I.) 180 



Mr. W. Galbraith on the Determination of the Distance of a 

 given point on the Earth's Surface at, or very near, the level 

 of the sea, by observations on its depression from a known 

 height above it 181 



