vi CONTENTS OF VOL. XXII.- 
Page 
Dr. W. Gregory on a new Method of obtaining pure Silver, 
either in the Metallic State or in the form of Oxide ...... 283 
Dr. H. Will’s Observations on M. Reiset’s Remarks on the new 
Method for the Estimation of Nitrogen in Organic Com- 
pounds, and also on the supposed part which the Nitrogen of 
the Atmosphere plays in the formation of Ammonia ...... 286 
Mr. Talbot on the Iodide of Mercury ................2 000 297 
New Books :—Prof. Daniell’s Introduction to the Study of Che- 
mical Philosophy, being a Preparatory View of the Forces 
which concur to the Production of Chemical Phenomena .. 298 
Proceedings of the Royal Astronomical Society ............ 299 
— Chemical Society ............--....6- 317 
SHER CLs Cea BRE IOS SOE Dei bid Opin COMO wa Dado. 323 
Researches on the Formation of Moser’s Images .......... 324 
On the Effect of the Variation of Gravity on Ships’ Cargoes 
in different Latitudes, by a Correspondent .............. 326 
Meteorological Observations for February 1843............ 327 
6 A RP oR Pa Re ES 328 
NUMBER CXLVI.—MAY. 
Mr. T. Graham’s Experiments on the Heat disengaged in Com- 
DUDALLODS ws opt etetens oe sbeRiaol aed eegevainyel cher cc zane da ere ene 329 
Prof. De Morgan on the Invention of the Circular Parts...... 350 
Mr. W. Rutherford’s Demonstration of some useful ‘Theorems 
in the Gedmetry of Coordinates ..)..0. 00004425. eens 353 
Mr. A. Cayley’s Remarks on the Rev. 5. Bronwin’s paper on 
M. Jacobi’s Theory of Elliptic Functions ..........6.. 358 
Dr. Draper on a new System of inactive Tithonographic Spaces 
in the Solar Spectrum analogous to the Fixed Lines of 
Praptihofer iis. tess he Ponda as ote eee oe ie ee 360 
Dr. Draper on the Tithonotype, or Art of multiplying Daguer- 
TEOLYPES | cls ot. a's wp liteleid 4 rte Pehcte ides aeeeomeninl abalete se aed eee 365 
Dr. Martin Barry’s Facts relating to the Corpuscles of Mammi- 
ferous Blood, communicated to the Royal Society ........ 368 
Carl Hochstetter’s Examination of the Composition of several 
Mineral*Substances, .../).,.0.¢ « fagisn sepa hee ee 370 
Mr. Henwood on the Appearances and Relative Positions of 
the Rocks and Veins which form the Opposite Walls of 
CrosaeWeinb). oi). visiais, aii tnele se selene, scl bea eee ae 373 
Mr. John Phillips on the Occurrence of Trilobites and Agnosti 
in the lowest Shales of the Paleozoic Series, on the Flanks 
of the Malvern Hills ..... rg leia lt babe 1s Soiaghist Or ob! Gly an 384 
Proceedings of the Royal Astronomical Society............ 385 
—__—— — Royal Irish Academy ................ 9399 
London Electrical Society .............. 412 
