CONTENTS. 



Page 

 Art. I. Biographical Memoir of the late Christian Smith, 



M.D. Naturalist to the Congo Expedition. By Ba- 

 ron Leopold Von Buch, _ - - 2O9 

 11. Description of the Contents of a Tumulus in the Pa- 

 rish of Burness, Island of Sanday. By William 

 Wood, Esq. Surgeon. (Communicated by Dr Wil- 

 liam Howison). With a Plate. - - 216 



III. Observations on the Anatomy of the Corallina opun- 



tia, and some other Corallines. By Prof. Schweig- 

 OER, ----- 220 



IV. On the Constitution of Flame. By H. Home Black- 



adder, Esq. F. R. S. E. Communicated by the Au- 

 thor. ----- 224 

 V. Hypothesis regarding Magnetism. By Dr BiicHNER, 236 



VI. On the Construction of Meteorological Instruments, 

 so as to ascertain their indications, during absence, 

 at any given instant, or at successive intervals of 

 time. With a Plate. - - - 238 



VII. Some mechanical Inquiries regarding the Tails of Co- 

 mets. By Dr Lehmann of Berlin, - 243 

 VIII. On the Snakes of Southern Africa. By Andrew^ 

 Smith, M. D. M. W. S. Assistant-Surgeon 98th Re- 

 giment, and Superintendant of the South African 

 Museum. Communicated by the Author. - 248 



IX. Picture of Vegetation on the Surface of the Globe. 



(Continued from p. 124 ) - - - 255 



X. Remarks on the Geological Position of the Strata of 

 Tilgate Forest in Sussex. By Gideon Mantell, 

 Esq. F. R. S. &c. In a Letter to Professor Jame- 

 son, - r^ - - - 262 



XI. Description of a Design for a Rotatory Steam-Engine. 

 By Mr James White. With a Plate. Communi- 

 cated by the Author, - - - 266 



