VI CONTENTS. 



Page 

 Mr. R. Phillips's Additional Observations on the Use of Che- 

 mical Symbols 246 



Rev. P. Keith on the External Structure of Imperfect Plants. . 252 

 Mr. O. Blewitt's Correction of an erroneous Statement respect- 

 ing Mr. Faraday, which is contained in the last. Edition of 



the " Panorama of Torquay" 261 



Mr. W. G. Horner on the Autoptic Spectrum of certain Vessels 



within the Eye, as delineated in Shadow on the Retina .... 262 

 Mr. S. Earnshaw on Prof. Moseley's Explanation of the " Prin- 

 ciple of Least Pressure" inserted in the Lond. and Edinb. 



Phil. Mag. for March- 271 



Mr. J. Hogg on the Influence of the Climate of Naples upon 

 the Periods of Vegetation as compared with that of some 



other Places in Europe 274 



Mr.C. T. Beke's Remarks on Mr. Carter's Paper on the Gopher- 

 wood 280 



Mr. .). Phillips on the Ancient and partly buried Forests of 



Holderness 282 



Facts relating to Optical Science. No. II. Communicated by 



Mr. H. F.Talbot 2S9 



Proceedings of the Royal Society; — Prof. Faraday's recent Dis- 

 coveries 291 



Royal Astronomical Society 295 



at the Friday- Evening Meetings of the Royal In- 

 stitution of Great Britain 296 



of the Zoological Society 297 



Linnaean Society 3U9 



Philosophical Society of Cambridge .... 212 



Action of Iodine on Starch — Analysis of Oil of Cloves, Indigo. 



&c 313 



Mode of obtaining Azote in Analyses 315 



On the Action of Gases hurtful to Vegetation 316 



Ledererite, a new Mineral 317 



Experiments with Potassium and Sodium 318 



Platina in Galena — British Association for the Advancement 



of Science — Scientific Books 319 



Meteorological Observations 32U 



NUMBER XXIII.— MAY. 



Mr. T. S. Thomson's Observations on Mr. Graham's Law of 



the Diffusion of Gases 321 



Mr. J. \Y. Lubbock on Cask-Gaging 326 



Notice of the Arrival of Twenty-six of the Summer Birds of 

 Passage in the Neighbourhood of Carlisle, during the Spring 

 of 183.'5, together with Notices of some of the scarcer Species 

 that have been obtained in the same Vicinity from the 10th 



