CONTENTS. ii 



PAGE 



Art. XVII. On the Ethnography of Akkrah and Adampe, 

 Gold Coast,' Western Africa. By William 

 Daniell, M.D., F.R.G.S., Assistant-Surgeon 

 to the Forces, &c. (Communicated by the Eth- 

 nological Society). Concluded from p. 130, 333 



XVIII. Defence of the Doctrine of Vital Affinity, against 

 the Objections stated to it by Humboldt and 

 Dr Daubeny. By Dr Alison, . . 340 



XIX. On the Blood-proper and Chylo-aqueous Fluids of 

 Invertebrate Animals. By Thomas Williams, 

 M.D., 342 



XX. The Future of Geology, ... 344 



XXI. Divisibility of Matter, .... 348 



XXII. On two New Processes for the detection of Fluo- 

 rine when accompanied by Silica ; and on the 

 presence of Fluorine in Granite, Trap, and 

 other Igneous Rocks, and in the Ashes of 

 Recent and Fossil Plants. By George Wil- 

 son, M.D., ..... 349 



XXIII. On the Presence of Fluorine in the Stems of 

 Graminese, Equisetacese, and other Plants; 

 with some Observations on the Sources from 

 which Vegetables derive this element By 

 George Wilson, M.D., . . . 356 



XXIV. Observations on the Relation between the Height 



of Waves and their Distance from the Wind- 

 ward Shore ; in a Letter to Professor Jameson. 

 By Thomas Stevenson, Esq., F.R.S.E., Civil 

 Engineer, ..... 358 



XXV. Additional Observations on the Green Teas of 



Commerce. By Robert Warrington, Esq., 

 F.C., ...... 368 



XXVI. On the Distribution of Granite Blocks from Ben 

 Cruachan. By William Hopkins, Esq., 

 F.R.S., President of the Geological Society, 362 



XXVII. On Fish destroyed by Sulphuretted Hydrogen in 



the Bay of Callao. By Dr J. L. Burtt, U.S.N. 363 



XXVIII. M. Melloni on Dew, .... 364 



Distribution of Dew in different Regions, 366 



Copiousness of Dew in Tropical Countries, 367 



Want of Dew in Polynesia, . . . 368 



