IV CONTENTS OF VOL. VII. — FOURTH SERIES. 



Page 



Prof. H. Buff on the Electricity of Plants 122 



Dr. Percy and Mr. R. Smith on the Detection of Gold in Lead 



and its Compounds 126 



Mr. J. Cockle on the Methodof Symmetric Products {concluded). 130 

 Prof. W. Thomson on the CEconomy of the Heating or Cooling 



of Buildings by means of Currents of Air 138 



Proceedings of the Royal Society 142 



On the Occurrence of Nickel andCobalt in some Mineral Springs, 



and on a Method for their Isolation, by Ossian Henry .... 149 

 On the Influence of Pressure upon the Formation of Chemical 



Compounds, by Prof. Wohler 150 



Meteorological Obser\-ations for December 1853 151 



Table 152 



NUMBER XLIV.— MARCH. 



Dr. Hirst's Reports on the Progress of the Physical Sciences. 153 

 On the Application of Magnetic Induction to the determi- 

 nation of the Magnetic Inclination. By Prof. W.Weber. 

 (With a Plate.) 153 



Mr. P. J. Martin on the Anticlinal Line of the London and 

 Hampshire Basins 166 



Sir D. Brewster on the Date of the Discovery of the Optical 

 Properties of Chrysammate of Potash. In a Letter to Prof. 

 Stokes 171 



Mr. W. J. M. Rankine on the Mechanical Action of Heat {con- 

 tinued) 172 



M. F. Savart on some Acoustic Phsenomena produced by the 

 motion of Liquids through short Efflux Tubes 186 



Prof. W. Thomson on the Mechanical Values of Distributions of 

 Electricity, Magnetism and Galvanism 192 



Prof. P^araday on Electric Induction — Associated cases of Cur- 

 rent and Static Effects 197 



Mr. A. Cayley on the Homograjihic Transformation of a Sur- 

 face of the Second Order into itself 208 



Dr. Booth on a particular case of Elliptic Integrals whose Para- 

 meters are Imaginary 213 



M. W. Haidinger on the Colours of Mausite 215 



Proceedings of the Royal Society 218 



Royal Institution 223 



Electro - deposition of Aluminium and Silicium, by George 

 Gore, Esq 227 



Experiments on the Artificial Production of Polychroism in Cry- 

 stallized Substances, by M. De Senarmont 228 



On Aluminium and its Compounds, by M. Deville 230 



Meteorological Observations for January 1854 231 



Table 232 



