CONTENTS. 



Art. VI. Chemical Examination of Drift- Weed Kelp from 

 Orkney. By George W. Brown, Esq. of Glas- 

 gow. Communicated by the Author, . 250 



Analysis of Orkney Drift- Weed Kelp, . 252 



Analysis of Insoluble Salts, . . . 253 



Quantitative Analysis of Insoluble Salts, . 253 



Analysis of Soluble Salts, . . . 257 



Quantitative Analysis of Soluble Salts, . 258 



Results of Analysis of Soluble Salts, . . 262 

 Table of Per-Centage Composition of Orkney 



Kelp. — Insoluble Salts, . . . 263 



Soluble Salts, 264 



VII. On the Colours of a Jet of Steam, . . 264 



VIII. Report upon the Alleged Adulteration of Pale 

 Ales by Strychnine. By Professors Graham 

 and Hoffmann, . . . 266 



IX. The New Metal Donarium is Thorina, . 274 



X. Chemico- Geological Researches on the Sulphurets 

 which are Decomposable by Water. By E. 

 Fremy, ...... 275 



XI. Analysis of Indian Ores of Manganese, and of 

 some Scottish Zeolites. By Dr A. J. Scott, 

 H.E.I. C.S. Communicated by the Author, 277 



XII. On the Erratic Formation of the Bernese Alps, 

 and other parts of Switzerland. By Charles 

 Maclaren, Esq., F.R.S.E.,F.G.S., and Mem- 

 ber of the Geological Society of France. Com- 

 municated by the Author. With Map and 

 engraved Illustrations, . . . 285 



XIII. Infusoria, the earliest Larval state of Intestinal 



Worms, according to Professor Agassiz, 314 



XIV. On the General Distribution of Iodine. By Mr 



Stevenson Macadam, Teacher of Chemistry, 

 Philosophical Institution, Edinburgh. Com- 

 municated by the Author, . . 315 



XV. Some Additional Observations on the Superficial 

 Colouring Matter of Rocks. By John Davy, 

 M.D., F.R.S.S., London and Edinburgh. Com- 

 municated by the Author, . . . 326 



XVI. On the Place of the Poles of the Atmosphere ; and 

 the Reid Theory of Hurricanes. By Professor 

 C. Piazzi Smyth, .... 330 



