CONTENTS OF VOL. IV. FOURTH SERIES. V 



Page 

 Dr. Herapath on the Chemical Constitution and Atomic Weight 



of the new Polarizing Crystals produced from Quinine .... 186 

 Mr. J. Napier on Copper Smelting. — Assaying of the Ores 



{continued) 192 



Mr. T. T. Wilkinson's Additions to the late Mr. T. S. Davies's 

 Notes on Geometry and Geometers. The Swale Manu- 

 scripts {continued) 201 



The Rev. T. P. Kirkman's Theorems in the Doctrine of Com- 

 binations 209 



Mr. M. Donovan on the supposed Identity of the Agent con- 

 cerned in the PhEenomena of ordinary Electricity, Voltaic 

 Electricity, Electro - Magnetism, Magneto- electricity, and 



Thermo-electricity {concluded) 210 



M. P. A. Reslhuber on the Decennial Period observed by 

 Dr. Lamont in the Magnitude of the Diurnal Motion of the 



Magnetic Needle 219 



Mr. R. Adie on the unequal Heating Effect of a Galvanic Cur- 

 rent while entering and emerging from a Conductor 224 



Notices respecting New Books : — Dr. Jones on Animal Elec- 

 tricity ; being an Abstract of the Discoveries of Emil du 

 Bois-Rejrmond, Member of the Academy of Sciences, Berlin, 

 &c. ; Mr. G. Woodhead on Atmosphere : a Philosophical 



Work , 226 



Proceedings of the Royal Society 230 



On a Brilliant Meteor seen at Sidmouth 2-36 



On the indirect Bleaching Power of Mercury, by C. F. Schonbein 238 



On the indirect Bleaching Power of Stibsethyle 239 



Meteorological Observations for July 1852 239 



■ Table 240 



NUMBER XXV.— OCTOBER. 



Dr. Tyndall's Reports on the Progress of the Physical Sciences : 

 On the Stereoscopic Combination of Colours, and on the 

 Influence of Brightness on the relative Intensity of dif- 

 ferent Colours. By H. W. Dove 241 



Letter of M. Quetelet to M. Lamont on Atmospheric Electricity, 

 according to the Observations at Munich and Brussels. .... 249 



M. A. Quetelet on the state of Static and of Dynamic Electricity 

 during several heavy Showers observed at Brussels on tlie 

 14th of June 1852 253 



Prof, 'i'liomson on the Mechanical Action of Radiant Heat or 

 Light : On the Power of Animated Creatures over Matter : 

 On the Sources available to Man for the production of Mecha- 

 nical Effect 256 



Dr. Mallet on a new Fossil Resin 261 



Mr. J. Napier on Copper Smelting. — On the Fuel suitable for 

 Copper Smelting {continued) 262 



