CONTENTS. V 



Pace 



Scientific Books 159 



Meteorological Observations 160 



NUMBER XXL— MARCH. 



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



Coal-fields at present worked 161 



Mr. J. Nixon on the Trigonometrical Height of Ingleborough 



above the Greeta at Ingleton 163 



The Marquis Di Spineto on the Zimb of Bruce, as connected 



with the Hieroglyphics of Egypt 170 



Mr. W. G. Carter on the Gopher-wood of the received Version 



of the Scriptures 178 



Mr. J. D. Fprbes's Experimental Researches regarding certain 



Vibrations which take place between Metallic Masses having 



different Temperatures {concluded) 182 



Rev. H. Moseley's Reply to Mr. Earnshaw's Remarks on the 



" Principle of Least Pressure" 191< 



Rev. T. J. Hussey's Catalogue of Comets (continued) 205 



Rev. W. Ritchie's Remarks on Mr. Christie's Bakerian Lecture, 



published in the Philosophical Transactions for 1833, Part I. 208 

 Mr. J. Curtis's Descriptions of some hitherto nondescript 



British Species of Mayflies of Anglers (concluded) 212 



New Books : — Lubbock's Mathematical Tracts 218 



Proceedings of the Royal Society 220 



Geological Society 225 



Royal Astronomical Society 230 



Prof. Stevelly's Mode of determining the Variation and Dip of 



the Magnetic Needle 232 



On the Cause of the Meteorological Phsenomena observed in 



the Mount's Bay, by Mr. Hen wood — MM. J. Gay-Lussac 



and J. Pelouze on Lactic Acid 233 



Morphia in Poppy Seeds 2.J6 



Analysis of the Blue Arseniate of Copper of Cornwall— Origin 



of Azote in Animal Substances 237 



Action of Heat on Iodide of Amidine 238 



Composition of Atropia 239 



Meteorological Observations 240 



NUMBER XXII.— APRIL. 



Sir David Brewster on the Influence of successive Impulses 

 of Lif^ht upon the Retina 241 



Sir David Brewster's Account of a Khombohedral Crystalliza- 

 tion of Ice 24-5 



