201 



1830, 1831. Reduced under the tSuperintendence of G. B. Airy, 

 Esq., Astronomer Royal. London, 1849. 4to. — From the same. 



Observations on Days of Unusual Magnetic Disturbance, made at the 

 British Colonial Magnetic Observatories, under the Departments 

 of Ordnance and Admiralty. Printed by the British Government, 

 under the Superintendence of Lieut. Col. Edward Sabine, of the 

 Royal Artillery. Vol. [. Part 2. 1842, 1843, 1844. London, 

 1851. 4to. — From the British Government, through Col. Sabine. 



Monthly Notices of the Royal Astronomical Society. Vol. XI. No. 4. 

 Feb. 15, 1851. London. 8vo. — Fro7n the Society. 



Transactions of the Cambridge Philosophical Society. Vol. IX. 

 Part 1. Cambridge, 1851. 4to. — From the Society. 



Observations des Phenomenes Periodiques. 1849. Bruxelles. 4to. 

 From, M. A. Quetelet. 



Rapport addresse a M. le Ministre de I'lnterieur, sur I'etat et les tra- 

 vaux de I'Observatoire Royal pendant I'annee, 1849. Par M. le 

 Directeur Quetelet.-— JProm the same. 



Fourth Annual Report of the Regents of the University of New York, 

 on the Condition of the State Cabinet of Natural History, and the 

 Historical and x\ntiquarian Collection annexed thereto. Made to 

 the Senate, January 14, 1851. Albany. 8vo. — Fi-om the Re- 

 gents of the University of Neio York. 



An Address delivered before the Rhode Island Historical Society, on 

 the evening of February 19, 1851. By Elisha R. Potter, Mem- 

 ber of the Society. Providence, 1851. 8vo. — From the Author. 



Papers on Practical Engineering : Published by the Engineer Depart- 

 ment, for the use of the Officers of the U. S. Corps of Engineers. 

 No. 5. An Analytical Investigation of the Resistance of Piles to 

 Superincumbent Pressure, deduced from the force of Driving ; 

 with an application of the formula to the foundations of Fort 

 Montgomery, Rouse's Point, N. Y. By Brevet Lieut. Col. James 

 L. Mason, Capt. U. S. Engineers. Washington, 1850. 8vo. 

 From Gen. J. G. Totten, U. S. Engineers. 



Dr. Franklin Bache announced the decease of Dr. Samuel 

 George Morton, a member of this Society, who died in this 

 city on the 15th inst., in the 52d year of his age, and accom- 

 panied the announcement by a brief notice of the scientific la- 

 bours of the deceased. 



On motion, Dr, Horner was appointed to prepare an obituary 

 notice of Dr, Morton. 



