CONTENTS. VII 



Page 

 Prof. J. J. Sylvester on an Extension of Sir John Wilson's 



Theorem to all Numbers whatever 454 



Proceedings of the Royal Society 454 



Xyloidine 467 



Determination of Iodine in Kelp 468 



Polarization of Platina Electrodes 469 



Sulphocyanide of Potassium as a test for Strychnia 470 



Analyses of Pectic Acid, by M. V. Regnault 47 1 



Pectates of Potash, Soda, and Ammonia 472 



On the Decomposition of Siliceous Minerals by means of Hy- 

 drofluoric Acid 473 



On the Separation of Compounds of the Oxides of Antimony 



and Lead 473 



Letter from Professor Johnston on the Analysis of the Resins 474 



Analysis of Comptonite 475 



Action of Chlorine on Acetic Acid 475 



Action of Chloride of Zinc on Alcohol 475 



Combination of Azote with Metals 476 



Solubility of Binoxide of Mercury in Water 477 



Decomposition of Lithic Acid by Nitric Acid 477 



Lactate of Urea 478 



Caoutchouc in Plants , . 478 



New Anomalous ReptUe 479 



Meteorological Observations 479 



NUMBER LXXXV.— SUPPLEMENT. 



Index 481 



Genekal Index to the London and Edinburgh Philoso- 

 phical Magazine and Journal of Science, vol. i. to xii. 



