Iv CONTENTS. 



Page. 



Dr. Samuel Rootsey on Mnemonical Logarithms 38 



Professor Forbes's Experiments on the Weight, Height, and Strength of Men at 



different Ages 38 



The Rev. W. Whewell's further Account of his Anemometer 39 



Mr. G. Webb Hall on the Connection of the Weather mth the Tide 41 



The Rev. L. Carpenter on Lucas's i\Iethod of Printing for the Blind 41 



Mr. J. S. Russell on the Ratio of the Resistance of Fluids to the Velocity of 



Waves 41 



Professor Sir W. R. Hamilton's Calculus of Principal Relations 41 



CHEMISTRY.; 



Dr. R. Hare on the Chemical Nomenclature of Berzelius 44 



Dr. R. Hare on a Calorimotor for Igniting Gases in Eudiometrical Experiments, 



and Gunpowder in Rock-blasting 45 



Dr. R. Hare on the Aqueous Sliding-rod Hydrogen Eudiometer 46 



Mr. Andrew Crosse's Electrical Experiments 47 



Mr. Henry Hough Watson's Remarks on the Results of some Experiments on 



the Phosphate and PjTo-Phosphate of Soda 48 



Mr. Thomas Exley's Extracts from a Paper " on Important Facts obtained Ma- 

 thematically ^fromJTheory, embracing most of those Experimental results in 



Chemistry, which are considered as ultimate facts." 50 



Dr. Charles Henry on Gaseous Interference 54 



Dr. Thomas^Thomson's Experimental on the Combinations]_of Sulphuric Acid 



and Water 56 



Mr. Wm. Black on a Method of ascertaining the Strength of Spirits 61 



Mr. Edmund^Davy's Notice of a new Gaseous- Bicarburet of Hydrogen 62 



Mr. Edmund Davy's Notice of a peculiar Compound of Carbon and Potassiiun, 



or Carburet of Potassium, &c 63 



Mr. Mushet on Iron-ore 64 



Dr. James Inglis on the Conducting Powers of Iodine 66 



Mr. J. F. W. Johnston on Paracyanogen, a new Isomeric Compoimd 67 



Mr. W. Herapath on Arsenical Poisons 67 



Mr. W. Herapath on Lithiate of Ammonia as a Secretion of Insects 70 



Mr. W. Herapath's Analj'sia of the Water of the King's Bath, Bath 70 



Mr. W. C. Jones on the Analysis of Wheat, a peculiar Volatile Fluid, and a So- 

 luble Modification of Gluten, Nitrogen in Lignin, &c 74 



Dr. Daubeny's Notice of Experiments respecting the effects which Arsenic pro- 

 duces on Vegetation 76 



Mr. R. Scanlan on a new substance (Eblanine) obtained from the Distillation 



of Wood 76 



Mr. Knox on the Insulation of Fluorine 77 



Mr. Wm. Ettrick on a modification of the common Bellows Blowpipe 77 



Mr. Wm. West on a means of detecting Gases present, in small proportions, in 



Atmospheric Air 77 



