IV CONTENTS. 



P«ge 



Safety -tube fir the Combustion of the Mixed Gases Oxygen 

 and Hydrogen, invented b)' Mr. Hemming 82 



Conversion of Hydrocyanic Acid and Cyanurets into Am- 

 monia and Formic Acid — Isomeric Modification of Tartaric 

 Acid, by M.Braconnot S3 



M. Felouze on the Formation of Carbonate of Lime under the 

 Influence of Sugar 84 



Extemporaneous Solution of Chlorine — Separation of Per- 

 oxide of Iron from Protoxide of Manganese, by M. Liebig 8.'5 



Separation of Peroxide from Protoxide of Iron, by the same 

 — Separation of Peroxide of Iron from the Oxides of Cobalt 

 and Nickel, by the same — Preparation of Metallic Chrome, 

 by the same 86 



Occultations of Planets and fixed Stars by the Moon, in 

 July 1832 87 



Meteorological Observations made by Mr. Thompson at the 

 Garden of the Horticultural Society at Chiswick, near 

 . London; by Mr. Giddy at Penzance, and Mr.Veallat Boston 88 



NUMBER II.— AUGUST. 



Sir D. Brewster on the Effect of Compression and Dilatation 

 upon the Retina 89 



Rev. C. P. N. Wilton's Sketch of the Geology of Six Miles of 

 the South-east Line of the Coast of Newcastle in Australia 92 



Mr. J. Blackwall's Observations on the House Spider, in reply 

 to a Statement in the Zoological Journal, quoted in the Phil. 

 Mag. and Annals, vol. x. p. 18t 95 



Mr. J. Nixon's Particulars of the Measurement, by various 

 Methods, of the Instrumental Error of the Horizon-Sector 

 described in Phil. Mag. vol. lix. (continued) 98 



Dr. E. Turner on some Atomic Weights 109 



Mr. G. H.Fielding on a new Membrane in the Eye 116 



Mr. B. Bevan on the Investigation of the Strength of Timber 

 and other Materials, with reference to the recent Experi- 

 ments and Communications of Mr. Peter Barlow, jun 116 



Rev. W. D. Conybeare's Inquiry how far the Theory of M. 

 Elie de Beaumont concerning the Parallelism of Lines of 

 Elevation of the same Geological TEra, is agreeable to the 

 Phfenomenaas exhil)ited in Great Britain [continued) 118 



Mr. J. O. Westwood's Descriptions of several new British Forms 

 amongst the Parasitic Hymenoptorous Insects 127 



Prof. M. A. Kupffer's Notice of some recent Magnetical Dis- 

 coveries 129 



M. G. Fuss's Account of the Magnetical and Meteorological 

 Observations made at Pekin 1 30 



Note on the Mean Temperature of Nicolaieff. Conmiunicated 

 by Prof M. A . Kupffer 1 32 



M. Rudberg on the Refraction of difttrently-coloured Rays in 

 Crystals with one and two Axes of Double Refraction .... 136 



