279 



Journal of ihe Franklin Institute of the Stale of Pennsylvania. Vol. 



XLII. No. 249. Third Series. Vol. Xll. September, ^1846. 



No. 3. 8vo. — From Dr. Patterson. 

 The American Journal of Science and Arts. Second Series. No. 5. 



September, 1846. 8vo. — From the Editors. 

 An Account of the Magnetic Observations made at the Observatory 



of Harvard University, Cambridge. Communicated by Joseph 



Lovering. 4to. — From Prof. Levering. 

 The Medical News and Library. Vol. IV. September, 1846. No. 



45. 8vo. — From Messrs. Lea t^ Blanchard. 

 Correspondencia con los Ministros de Inglaterra, y de Francia sob re 



los asuntos de la Pacificacion, presentada a la H. Sala de Repre- 



sentantes por el Gobierno de Buenos-Aires, encargado de las Re- 



laciones Exteriores de la Confederacion Argentina. Buenos-Aires, 



1846. 4to. — From Don Pedro de Angelis. 



ADDITIONS TO THE LIBRARY BY PURCHASE. 



Scientific Memoirs, selected from the Transactions of Foreign Acade- 

 mies of Science and Learned Societies, and from Foreign Jour- 

 nals. Edited by Richard Taylor, F.S.A. &c. Vol. IV. Part XV. 

 June, 1846. 8vo. 



Astronomische Nachrichten. Nos. 560 to 563, inclusive. Altona, 

 May 30 to June 25. 4to. 



Mr, Peale read the following letter from Dr. Franklin to 

 Dr. Kimmersley, dated London, July 17, 1771. 



Dear Sir, — I was much obliged by your account of the effect of 

 the lightning on Mr. Holder's house. It will be in the Transactions 

 here. I wonder it is not to be found in yours. Those here, who 

 aimed at obtaining a very great electric force, have been much dis- 

 couraged by the breaking of the bottles that composed their batteries. 

 A gentleman of my acquaintance lost eight out of twenty at one 

 stroke; another twelve out of forty. Having heard that Pere Bec- 

 caria had lined the inside of a great iron kettle with cement, and then 

 coated a part of the cement with tinfoil, from whence he could dis- 

 chai"ge a great stroke; and if any crack happened to his cement, he 

 mended it again with a hot iron ; I recommended trying to make 

 batteries of paper, by straining the sheets on frames, drying them hot 

 before the fire; then impregnating them with melted wax, and after- 

 wards coating them with tinfoil. This another ingenious friend has 

 VOL. IV.-- 2 



