CONTENTS 



OF THE 



EDINBURGH JOURNAL OF SCIENCE. 



No. VII. 



Page 

 Art. I. Biographical Notice of the Abb6 Hatiy, . . • 1 



II. A Popular Summary of the Experiments of Messrs Barlow, Christie, 

 Babbage, and Herschel, on the Magnetism of Iron and other Metals, as 

 exhibited by Rotation. By a Correspondent. - - - 13 



III. Account of an Improvement on the Galvanic Battery. By Mr John 

 Hart, Civil Engineer, Glasgow. In a Letter to the Editor. - 19 



IV. An Account of the Frontier between the Southern part of Bengal and the 

 Kingdom of Ava. By Francis Hamilton, M. D. F. R. S. and F. A. S. 

 Lond. and Edin. Communicated hy th<? A.nthor — ( Concluded from Vol. 

 III. p. 212.) ..... .22 



V. Proposal for Improving the Phantasmagoria. By William Ritchie, 

 A. M., Rector of Tain Academy. In a Letter to the Editor, - 37 



VI. Notices of Insects of unusual occurrence which have occasionally appear, 

 ed in great numbers on Trees, &c. By Sir G. S. Mackenzie, Bart., 

 F. R. S. Lond. and Edin. In a Letter to the Editor, - - ib. 



VII. On the Crystalline Forms and Properties of the Manganese Ores. By 

 William Haidinger, Esq. F. R. S. E. Communicated by the Author. 

 With a Plate, - - - - - 41 



VIII. Account of the Eruption of the Volcano of Jorullo in Mexico. By Ba- 

 ron Alexander de Humboldt. With a Section of the Mountain, 50 



IX. Observations on Humboldt's Theory of the Volcano of Jorullo. By G. 

 Poulett Scrope, Esq. Secretary to the Geological Society, - 55 



X. Observations on the apparent Distances and Positions of 389 Double and 

 Triple Stars. By J. F. W. Herschel, Esq. Sec. R. S. Lond., and 

 F. R. S. Edin. and James South. Esq. F. R. S. Lond. and Edin — 

 (Concluded from Vol. III. p. 288,) - CC 



XL Notice of an Earthquake felt at Sea, in February 1825. Communicat- 

 ed by a Correspondent, ..... 70 



XII. Remarks on the Defoliation of Trees. By the Rev. John Fleming, 



D. D. F. R. S. E. &c. Communicated by the Author, - - ?2 



XIII. On the Habits and Food of the Stickleback. From a Correspondent, 7<* 



XIV. On the Improvement of the Pipes of Organs. By M. Feux SATaiit, 80 



