TABLE OF CONTENTS. 



NUMBER XXV— JULY. Page 



Mr. R. W. Fox on Magnetic Attraction and Repulsion and on 



Electrical Action 1 



Mr. G. Fairholme on the Falls of Niagara, with some Observa- 

 tions on the distinct Evidence which they bear to the Geo- 

 logical Character of the North- American Plains 11 



Rev. John Kenrick on the alleged Greek Traditions of theDeh 



luge, {concluded) 25 



Dr. W. C. Henry's Remarks on the Atomic Constitution of 



Elastic Fluids 33 



Mr. J. H. Pratt's Demonstration of the Parallelogram of Forces. 39 



Mr. A. Connel's Analysis of Levyne, 40 



Rev. W. D. Conybeare on the probable future Extension of 



the Coal-fields at present worked in England {concluded) . . 44 

 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 {continued) 46 



Mr. J. Blackwall's Characters of some undescribed Species of 



Araneidce 50 



Proceedings of the Geological Society 53 



Linnsean Society 70 



Zoological Society 72 



Royal Institution of Great Britain 74 



New Books : — Prof. Daubeny's Inaugural Lecture on the Study 



of Botany 75 



Recent Discovery of Bones of the Iguanodon 77 



Muriatic Acid in Fluor Spars — Polyspherite, or Brown Phos- 

 phate of Lead — New Radical Analogous to Cyanogen 78 



M. Boussingault on Suboxide of Lead and Protoxide or Tin — 



Scientific Books 79 



Meteorological Observations made by Mr. Thompson at the 

 Garden of the Horticultural Society at Chiswick, near 

 London, and by Mr. Veall at Boston 80 



NUMBER XXVI.— AUGUST. 



Capt. P. Yorke's Experiments and Observations on the Action 

 of Water and Air on Lead 81 



Rev. H. Moseley on the Application of the Principle of Least 



Pressure to the Theory of Resistances 95 



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