IV CONTENTS. 



Page 



XXII. Account of the Erection of a Granite Obelisk, 

 of a single Stone, about seventy feet high, at 

 Seringapatam. By Alexander Kennedy, M.D. 

 F. R. S. Edin. &c. - - 307 



XXIII. Account of a Remarkable Structure in Apophyl- 



lite, with Observations on the Optical Pecu- 

 liarities of that Mineral. By David Brewster, 

 LL. D. F. R. S. Lond. & Sec. R. S. Edin. 317 



XXIV. On the Application of Analysis to the Discove- 



ry of Local Theorems and Porisms. By 

 Charles Babbage, Esq. F. R. S. Lond. & Edin. 337 



XXV. Observations on the Errors in the Sea-Rates of 



Chronometers, arising from the Magnetism of 

 their Balances ; with Suggestions for removing 

 this source of Error. By William Scoresby, 

 Esq. junior, F, R. S. Edin. - - 353 



XXVI. Report on a Communication from Dr Dyce of 



Aberdeen, to the Royal Society of Edinburgh, 

 " On Uterine Irritation, and its Effects on 

 the Female Constitution.^ '' By H. Dewar, 

 M. D. F. R. S. Edin. - - 365 



XXVII. Description of some Indian Idols in the Mu- 



seum of the Society. ByW. A. Cadell, Esq. 



F. R. S. Lond. & Edin. - - 381 



XXVIII. Observations on the Formation of the Chalk 

 Strata, and on the Structure of the Belemnite. 



By Thomas Allan, Esq. F.R.S. Lond. & Edin. 393 



XXIX. On a Submarine Forest in the Frith of Tay, 



with Observations on the formation of Sub- 

 marine Forests in general. By John Fleming, 

 D. D. F. R. S. Edin. - - 419 



XXX. Description of a Monochromatic Lamp for 



Microscopical purposes, fyc. with Remarks on 



the 



