CONTENTS OF VOL. XXXII. THIRD SERIES. V 



Page 

 Mr. J. Goodman's Researches into the Identity of the Exist- 



encies or Forces — Light, Heat, Electricity and Magnetism. . 172 

 Sir D. Brewster on the Phsenomena of Thin Plates of Solid and 



Fluid Substances exposed to Polarized Light. (With a Plate.) 181 

 Mr. A. Claudet on Photographic phsenomena referring to the 

 various Actions of the red and yellow Rays on Daguerreotype 



Plates when they have been affected by daylight 199 



M. Niepce de Saint- Victor's Observations on some remarkable 



Properties of Iodine, Phosphorus, Nitric Acid, &c 206 



Mr. A. Claudet on the Question of Priority respecting the 

 Discoveiy of the accelerating process in the Daguerreotype 



operation 215 



Notices respecting New Books : — Daubeny on Volcanos, Earth- 

 quakes and Thermal Springs 216 



Proceedings of the Royal Society 219 



On a remarkable Solar Spot 232 



On the Preparation and Chemical Constitutioirof Asparagin . . 233 



On the Transformations of Asparagin 235 



On Chrysammic Acid, by M. Mulder 236 



Meteorological Observations for January 1848 239 



Table 240 



NUMBER CCXV.— APRIL. 



Prof. De Morgan's Account of the Speculations of Thomas 

 Wright of Durham 241 



Mr. R. Hunt on the supposed Influence of Magnetism on Che- 

 mical Action 252 



The Rev. B. Bronwin on the Solution of a particular Differen- 

 tial Equation 256 



M. Melloni's Researches on the Radiations of Incandescent 

 Bodies, and on the Elementary Colours of the Solar Spectrum 262 



The Rev. J. Challis's Theoretical Determination of the Velocity 

 of Sound 276 



Mr. S. Roberts on the Development of Functions of the form 

 ¥(z+x) 284 



Notices respecting New Books: — Daubeny on Volcanos, Earth- 

 quakes and Thermal Springs 287 



Proceedings of the Royal Society 300 



On a late Solar Spot, by W. Pringle, Esq 308 



On a new Method of distinguishing the Protoxide of Iron from 

 the Peroxide by the Blowpipe, by E. J. Chapman, Esq 309 



On the Existence of several Metals in the Human Blood, and 

 the Fixed Salts it contains 310 



On the Artificial Formation of Crystallized Minerals, by M. 

 Ebelmcn 312 



On the Crystalline form of Metallic Zinc 314 



