120 



The following donations were announced: — 



FOR THE LIBRARY. 



Transactions of the Royal Irish Academy. Vol. XXII. Part 1. 

 Dublin, 1849. 4to. — From the Academy. 



Proceedings of the Royal Irish Academy. Vols. II. III. and Parts 

 1 & 2 of Vol. IV. Dublin, 1849. Qvo.—From the same. 



Journal of the Franklin Institute. Third Series. Vol. XVIII. No. 6. 

 Dec. 1849. Philadelphia. 8vo. — From the Institute. 



On the Diurnal Variations in the Declination of the Magnetic Needle, 

 and in the Intensities of the Horizontal and Vertical Magnetic 

 Forces. By William A. Norton, Prof, of Math. & Nat. Phil, in 

 Delaware College. (Extract from American Journal of Science 

 and Arts. Vol. VIII. Second Series. 1849.) — From the Author. 



The American Journal of the Medical Sciences. No. XXXVII. New- 

 Series. January, 1850. Philadelphia. 8vo. — From Dr. Isaac 

 Hays, Editor. 



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

 25. January, 1850. New Haven. 8vo. — From Profs. Silli- 

 man and Dana, Editors. 



Report on the Finances of the Commonwealth of Pennsylvania, for 

 the year ending November 1, 1849; made to the Governor by 

 the Auditor-General, agreeably to law. Harrisburg, 1849. 8vo. 

 From Benjamin Matthias, Esq. 



Relacion Historica del Viage a la America Meridional, hecho del 

 Orden de S. Mag. para medir algunos grades de Meridiano Ter- 

 restre, y venir por ellos en conocimiento de la verdadera Figura 

 y Magnitud de la Tierra, con otras varias Observaciones Astro- 

 nomicas y Phisicas. Por Don Jorge Juan, y Don Antonio de 

 Ulloa. Madrid, 1748. 4 Vols. 4to. — From Professor J. F. 

 Frazer. 



Observaciones Astronomicas y Phisicas, hechas de orden de S. M. 

 en los Reynos del Peru. Por Don Jorge Juan, y Don Antonio 

 de Ulloa: De los quales se deduce la Figura y Magnitud de la 

 Tierra, y se aplica a la Navegacion. Madrid, 1773. 4to.— 

 From the same. 



Prof. Frazer called the attention of the Society to an in- 

 teresting paper by Prof. James D. Dana, " On the Denudation 

 of the Pacific," published in the last number of the American 

 Journal of Science and Arts. This gave rise to a discussion 



