CONTENTS, 



NUMBER 11. 



Page. 



Art. I. Some notice of British Naturalists; by Charles Fox, 217 

 II. On the Natural History of Volcanos and Earthquakes ; 

 by Dr. Gustav Bischoe, Prof, Chera. Univ. of Bonn. 

 Communicated by the Author, - - - . 230 



III. Descriptive Catalogue of the North American Insects 



belonging to the Linnasan Genus Sphinx in the Cabinet 

 of Thaddeus William Harris, M. D., Librarian of 

 Harvard University, -.._-. 282 



IV. On American Amphibia; by Abm. Sager, M. D., - 320 

 V. Translations relative to Bowlders and Cobalt Ores, from 



the Neues Jahrbnch fur Mineralogie, Geognosie, Geolo- 

 gie und Petrefaktenkunde, herausgegeben von Dr. Le- 

 ONHARD und Dr. Bronn. Jahrgang, 1838. Rev. W. 

 A. Larned, -- 325 



VI. A New Method of Making Permanent Artificial Magnets 

 by Galvanism ; by J. Lawrence Smith, Student of the 

 Medical College of South Carolina, - - - 335 



VII. Remarks on the "Natural History of the Fishes of Mas- 

 sachusetts, embracing a Practical Essay on Angling ; 

 by Jerome V. C. Smith, M. D." By D. Humphreys 



Storer, M. D., - - 337 



VIIT. Electro Magnetism ; by Charles G. Page, M. D., 350 



IX. Observations on Electricity ; by Chas. G. Page, M. D., 353 

 X. Additional Account of the Shooting Stars of December 



6 and 7, 1838; communicated by Edward C. Herrick, 355 



XI. On the Meteoric Shower of April 20, 1803, with an ac- 

 count of Observations made on and about the 20th 

 April, 1839; by Edward C. Herrick, - . - 358 

 XII. Notice of a Report on a re-examination of the Economi- 

 cal Geology of Massachusetts ; by Prof. Edward Hitch- 

 cock. Communicated by Prof. C. U. Shepard, - 363 



miscellanies. 



1. Scientific Proceedings of the Boston Society of Natural His- 



tory, 379 



2, 3, 4. African Meteorite — New Species of Argulus ; notice 



from Dr. T. W. Harris — Cabinet of Minerals for sale, 393 



