IV CONTENTS. 



Page 

 Mr. P. J. Martin on a remarkaLle Fall of Hail; with Observa- 

 tions on the probable Nature of such Phsenomena 85 



_Mr. J. W. Gutch's Notice of certain Meteorological Phseno- 



mena observed at Swansea 87 



Mr. Ivory (The Bakerian Lecture) on the Theory of the Astro- 

 nomical Refractions {concluded) 89 



Prof. Forbes's Letter to Richard Taylor, Esq., with reference to 



two Papers in the Philosophical Magazine for January, 1840 102 

 Mr. Gulliver's Observations on the Blood Corpuscles, or Red 



Particles of the Mammiferous Animals. No. II 105 



Mr. T. Hawkins on Galvanic Series formed of Zinc and Inactive 



Iron 115 



Mr. W. S. Harris on Lightning Conductors, and the Effects of 



Lightning on Her Majesty's Ship Rodney, and certain other 



Ships of the British Navy, being a further examination of 



Mr, Sturgeon's Memoir on Marine Lightning Conductors. . 116 



Dr. Kane on a new Compound of Ferrocyanide of Potassium 



M'ith Cyanide of Mercury 128 



Th. Scheerer on the Decomposition of the Neutral Sulphate of 



the Peroxide of Iron by boiling its Solution 130 



Prof. Sylvester's Method of determining by mere Inspection 



the derivatives from two Equations of any degree 132 



Mr. Halliwell's New Researches on the true nature of the 

 Boetian Contractions, especially with reference to the. Ex- 

 planation given by M. Chasles 136 



Mr. R. Hunt on the Permeability of various bodies to the Che- 

 mical Rays 138 



Mr. M. Roberts on an anomalous Electric Condition of Iron. . 142 



New Books : — Curtis's British Entomology 144 



Proceedings of the Geological Society 144 



■ — ■■ Royal Astronomical Society 148 



Theory of Substitutions — Acetic and Chloroacetic Acids .... 152 



MjTonin, Myronic Acid — Essential Oil of Mustard 153 



Polychromatic Acid 154 



Cyanil 154 



Action of Albumen on Metallic Salts 154 



Haydenite 155 



Beaumontite, a new Mineral 156 



An Account of the Experiment proposed by M. Arago as a 

 Test of the accuracy of the undulatory Hypothesis of Light 157 



Meteorological Observations for December 1839 159 



■ Table 160 



NUMBER CIL— MARCH. 



Mr. R. Griffith on the true Order of Succession of the Older 

 Stratified Rocks in the Neighbourhood of Killarney and to 

 the North of Dublin 161 



