11 CONTENTS. 



Page 

 purpose of determining the Decrease of Heat in Ascending in the At- 

 mosphere. Communicated to the Editor by Sir Thomas Bris- 

 bane, K.C.B. F.R.S. Lond. and Edin. - - 246 



XIV. On the Mean Temperature of Chapel Hill, North Carolina, as deter- 

 mined by President Caldwell, . - - 249 



XV. Account of an Improvement on the Nautical Eye-Tube. By David 



Brewster, LL.D. F.R.S. Lond. and Sec. R.S. Edin. - 250 



XVI. On the Temperature of the North West Coast of America. By Mr 

 Scouler. Communicated by the Author, - - 251 



XVII. Magnetical Observations on the Variation and Dip of the Needle, 

 made during the Voyage of the Coquille from Toulon to Port Jack- 

 son, in 1822, 3, and 4. By M. Duperrey, Commander of the Ex- 

 pedition. Communicated by Sir Thomas Makdougall Brisbane, 

 K.C.B. F.R.S. London and Edinburgh, - . 254 



XVI II. Notes on the Habits of the Wild Pigeon of America, Columba migra- 

 toria. By John James Audubon, Esq. F.R.S. Edin. M.W.S. &c. 



&c and Member of the Lyceum of New York, - - 257 



XIX. On the Developement of Magnetism by Rotation, in reply to Mr 

 Christie. By P. Barlow, Esq. F.R.S. Mem. Imp. Ac. Petrop. &c. 

 Communicated by the Author, - - - 265 



XX. On the Progressive Compression k of Water with High Degrees of Force, 



with Trials of its effects on other Fluids. By J. Perkins, Esq. 267 



XXI. On Burrowing and Boring Marine Animals. By Ed. Osler, Esq. 270 



XXII. Summary for the year 1826 of the state of the Barometer, Thermome- 

 ter, &c in Kendal. By Mr Samuel Marshall. - 274 



XXIII. On the production and formation of Pearls. By Sir Everard 

 Home, Bart. V. P. R. S. With observations by the Editor, - 275 



XXIV. On the Regular Composition of Crystallized Bodies. By W. Haid- 

 inger, Esq. F. R. S. E. Communicated by the Author, - 278 



XXV. Or a Remarkable Effect of a Magnet on the Oscillations of the Pen- 

 dulum of a Clock. By George Harvey, Esq. F. R. S. L. and E. 288 



XXVI. On the different Primitive Forms of the same Salt produced by a 

 Change in the Nature of the Solvent. By Dr Christian Wollner. 

 With Observations by the Editor, - 289 



XXVII. A Description of some remarkable Effects of unequal Refraction 

 observed at Bridlington Quay in the Summer of 1826. By the Rev. 



W. Scoresby, F. R. SS. Lond. and Edin. M. W. S. &c. - 293 



XXVIII. On the Elements of the Four New Planets Vesta, Juno, Ceres, 

 and Pallas, - - - 294 



XXIX. Description of the New Mineral called Haytorite, drawn up from the 

 Observations of Messrs Trite, Cole, Phillips, and Levy, 297 



XXX. Observations on the Structure and Crystalline Forms of Haytorite. In 



a letter from Dr Brewsteb to Cornelius Tripe, Esq. 301 



XXXI. Account of a New Animal, which dyed Red the Lake of Morat in the 

 Spring of 1825. By Professor Decandolle, - 307 



XXXII. On a New Class of Electro-Chemical Phenomena. By M. Leo- 

 pold Nobili, - - 311 



XXXIII. On Haidingerite, a new mineral species. By Edward Turner, 

 M.D. F.R.S.E. Lecturer on Chemistry, and Fellow of the Royal Col- 

 lege of Physicians, Edinburgh. Communicated by the Author, 317 



XXXIV. An Account of Magnetical Experiments made in China and St 



