CONTENTS 



OF THE 



EDINBURGH JOURNAL OF SCIENCE. 



No. X. 



Page 

 Art. I. Account of a Voyage to Madeira, Brazil, Juan Fernandez, and the 

 Gallapagos Islands, performed in 1824 and 1825, with a view of ex- 

 amining their Natural History, &c. By Mr Scouler. Com- 

 municated by the Author, ... 195 

 II. Illustration of some Facts connected with the Developement of Mag- 

 netism by Rotation. By Peter Barlow, Esa. F.R.S. Mem. 

 Imp. Ac. Petrop. &c. In a Letter to the Editor, - 214 



III. Observations on the Decrease of the Magnetic Intensity of the Earth. 

 By Christopher Hansteen, Professor of Astronomy in the Uni- 

 versity of Norway. Communicated by the Author in a Letter to the 

 Editor, - - - 218 



IV. Account of an Earthquake at Sea, felt in the Mediterranean, on the 



29th November 1810, in his Majesty's frigate Salsette. In a Letter 

 from Captain Beaufort, R.N. F.R S. to Dr Brewster, 222 



V. Conjectures as to the Cause of the high degree of apparent acceleration 

 in the Rates of the Chronometers observed by Mr Fisher, and Report- 

 ed by him in the Phil. Trans. By Peter Barlow, Esq. F. R. S. 

 Mem. Imp. Acad. Petrop. Communicated by the Author, 224 



VI. Remarks on an Optical Phenomenon observed at sunrise from the 

 Summit of Mount jEtna. By H. H. Blackadder, Esq. F.R.S. 

 Edin. Communicated by the Author, - 227 



VII. Abstract of Meteorological Observations made in the Isle of Man, from 



1822 to 1825, inclusive. By Robert Stewart, Esq. Receiver-Ge- 

 neral of the Isle of Man. Communicated by Dr Hibbert, 231 



VIII. An attempt to account for the fact that the Stars appear greater in 

 number when viewed cursorily than when examined with attention. 



By a Correspondent, - - - 234 



IX. On the Spawn of Salmon, observed in its progressive State, and Drawn 

 from Nature. By L. Schovberg, Esq. Communicated by the Au- 

 thor. With a Plate, . . • 238 

 X. Notice of the severe Cold of last Winter, and of the late great Heats 

 in June 1 828, with original Observations. By a Correspondent, 240 



