CONTENTrxW VOL. XXXI. — THIRD SERIES. V 



Page 

 Letter from Prof. Schoenbein to Prof. Faraday, F.R.S., on a 



new Test for Ozone 176 



Dr. G. Wilson on the Decomposition of Water by Platinum and 

 the Black Oxide of Iron at a white heat, with some observa- 

 tions on the theory of Mr. Grove's Experiments 177 



Mr. J. J. Sylvester's account of a Discovery in the Theory of 



Numbers relative to the Equation Ax^ +By^ + Cz'^=Dxyz . . 189 

 Experiment made at the Kew Observatory on a new Kite- Appa- 

 ratus for Meteorological Observations, or other purposes . . 191 

 Dr. L. Playfair on Transformations produced by Catalytic Bo- 



dies 192 



Sir W. R. Hamilton on Quaternions ; or on a New System of 



Imaginaries in Algebra (continued) 214 



Notices respecting New Books 219 



Proceedings of the Royal Society 222 



Suggestions for the observation of the Annular Eclipse, Oct. 9, 

 1847, made by the British Association for the Advancement 



of Science, Oxford, June 26, 1847 228 



On the Preparation and Composition of the Salts of Antimony, 



by M. E. Peligot 230 



Action of Hydrochloric Acid in the Formation of Oxalic Acid 233 



Projection of Aldebaran on the Moon 233 



The PufF Parliamentary : — Disinfection 233 



A Grant of 200/. to Mr. William Sturgeon 236 



Observations on Creatine, by M. Heintz 236 



The New Planet Iris 237 



Suggestions for Promoting the Science of Meteorology 238 



Meteorological Observations for July 1847 239 



Table 240 



NUMBER CCVIIL— OCTOBER. 



Prof. E. Wartmann's Fourth Memoir on Induction. (With a 



Plate.) 241 



Mr. S. M. Orach on eliminating the Signs in Star- Reductions. . 251 



Mr. J. Brown on the Molybdate of Lead. 253 



Dr. R. D. Thomson's note on a new Test for Arseniates, &c.. . 258 

 Mr. E. W. Binney on Fossil Calamites found standing in an 

 erect position in the Carboniferous Strata near Wigan, Lanca- 

 shire 259 



Mr. E. Frankland and Dr. H. Kolbe upon the Chemical Consti- 

 tution of Metacetonic Acid, and some other Bodies related 



to it 266 



Messrs. T. H. Rowney and H. How's Analysis of the Ashes of 



the Orange-Tree (Citrus aurantium) 271 



Sir W. R. Hamilton on Quaternions ; or on a New System of 

 Tmaginaries in Algebra (continued) 278 



