iv CONTENTS OF VOL. XXII. 
NUMBER CXLIIL—FEBRUARY. 
Prof. O. F. Mossotti on the Constitution of the Sidereal System, 
of which the Sun forms a part... 5 0... ce eee eee eee 
The Rey. S. Earnshaw on a new Experiment in Physical Optics 
Mr. Talbot on the coloured Rings produced by Iodine on Silver, 
with Remarks on the History of Photography. . 
The Rey. Prof. Challis’s further Investigation of the Analytical 
Conditions of Rectilinear Fluid Motion». 2.2.2. See 
Sir John F. W. Herschel on the Action of the Rays of the Solar 
Spectrum on Vegetable Colours, and on some new Photogra- 
phie Processes (continued) db iessie Gos eine ehbiel gle ete Sars eee 
The Rey. P. Kelland’s Supplementary Remarks relative to cer- 
tain Arguments against the Theory of Molecular Action ac- 
cording | to’ Newton’s Law. 2050.5 iv 2 svete shee es meen 
Sir John F. W. Herschel on the Action of the Rays of the Solar 
Spectrum on the Daguerreotype Plate. . at 
Mr. F. W. de Moleyns on the Sustaining Voltaic ‘Battery, in 
reference to some Observations of Professor Daniell in the April 
Number of the Philosophical Magazine, 1842............ 
Proceedings of the Royal Society... ..........++-2e2-eee 
On the Force of Aqueous Vapour, in Reply to Mr. Moyle, by 
Jeep] OLD faye coef se pavolsies Eeeioie cues ee mista ts a heehee 
On the Extraordinary Depression of the Barometer on January 
13th, 1843, by H. H. Watson, Esq.. Seer aoe 
Meteorological Observations for December 1842 26 See 
od B16) Poh say agile Glan no OST is wiemenCta ie aT ECE fF 3 ee 
NUMBER CXLIV.—MARCH. 
Dr. Draper on the rapid Detithonizing Power of certain Gases 
and Vapours, and on an instantaneous means of producing 
Spectral Appearances. 22.2.5 2.2/8. ai.) . eae os ee ie 
Prof. Scheenbein on the Theory of the Gaseous Voltaic Bat- 
WEL Y, | Foye oa oles a psia ofp eteke woos lerelatoln te w tole, eine ae taints aati ie ae 
Mr. S. Fenwick’s Investigation of Brianchon’s Theorem...... 
Mr. W. Rutherford’s Demonstration of Pascal’s Theorem re- 
lative to the Hexagon inscribed in a Conic Section........ 
Sir John F. W. Herschel on the Action of the Rays of the Solar 
Spectrum on Vegetable Colours, and on some new Photogra- 
phic Processes (continued) 225.2... Jt). eo en oe ee ee 
Prof. Bunsen on Kakodylic Acid, and the Sulphurets of Kakodyle 
Prof. J. R. Young’s New Criteria for the Imaginary Roots of 
Equations) 2, cn. .06 ons Sei ele ee Eevee oe 
Dr. Thomson’s Notice of some new Minerals .,............ 
The Rey. P. Kelland on Mr. Earnshaw’s Reply to the Defence 
of the Newtonian Law of Molecular Action 
oes s Ve + © 6 sees 
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