CONTENTS OF VOL. V, 



(FOURTH SERIES.) 



NUMBER XXIX.— JANUARY 1853. 



Page 



Mr. J. P. Joule on the CEconomical Production of Mechanical 

 Effect from Chemical Forces 1 



Mr. W. J. M. Rankine on the Mechanical Effect of Heat and 

 of Chemical Forces. In a Letter to J. P. Joule 6 



Dr. Woods on the Heat of Chemical Combination 10 



The Rev. T. P. Kirkman's Note on Combinations 11 



Prof. Wartmann's Researches on the Conductibility of Minerals 

 for Voltaic Electricity ; and on the Electric Light 12 



Sir D. Brewster on the Optical Figures produced by the Disin- 

 tegrated Surfaces of Crystals. (With Five Plates.) 16 



Mr. R. Phillips on the Colours of a Jet of Steam and of the 

 Atmosphere 28 



Mr. J. Napier on Copper Smelting {continued) 30 



Mr. C. J. Hargreave on the Valuation of Life Contingencies 

 by means of Tables of Single and Joint Lives 39 



Mr. R. Adie on the Temperatures of Conductors of Electrical 

 Currents , 46 



M. W. Haidinger on the Direction of the Vibrations of the 

 Luminiferous ^ther in Plane-polarized Light 49 



Proceedings of the Royal Society 51 



On the Periodic Return of the Minimum of Sun-spots ; the 

 agreement between those Periods and the Variations of Mag- 

 netic Declination, by R. Wolf ?. . . . 67 



Result of some Experiments on the Chemical Action of Light, 

 by J. W. Slater, Esq 67 



Note on the induced Currents produced by the Torsion of Iron, 

 by G. Wertheim 69 



Meteorological Observations for November 1852 71 



Meteorological Observations made by Mr. Thompson at the 

 Garden of the Horticultural Society at Chiswick, near 

 London; by Mr. VeaU at Boston; and by the Rev. C. 

 Clouston at Sandwick Manse, Orkney 72 



NUMBER XXX.— FEBRUARY. 



M. C. Sondhauss on the Refraction of Sound 73 



Mr. J. H. Pratt, The Supernumerary Bows in the Rainbow 



arise from Interference 78 



Prof. Challis on the Principles of Hydrodynamics {concluded). . 86 



