others have recently made of the object-glass, made by Fitz, of 

 New York, for the telescope recently ordered by Lieut. Gil- 

 liss, for his observations to be made on the coast of the Pacific. 

 He stated that it promises to be equal in usefulness and power 

 to the Fraunhofer Telescope, at the High School Observatory, 

 a very superior instrument. 



Further observations on the manufacture of American glass 

 lenses, and other objects of flint and crown glass, were made 

 by Prof. Frazer. 



Mr. Justice gave an account of the early efforts and progress 

 of Mr. Fitz in the manufacture of telescopic lenses. 



Pending nominations, Nos. 226, 227 and 228, were read. 



On motion of Mr. Trego, it was ordered that the Maryland 

 Historical Society be placed upon the list of correspondents of 

 this Society. 



Stated Meeting, May 18. 



Present, nine members. 



Dr. Patterson, President, in the Chair. 



A letter was received and read: — 



From Prof. E. Everett, dated Cambridge, 10th May, 1849, 

 accompanying a donation to the Society. 



The following donations were announced: — 



FOR THE LIBRARY. 



Memoir on the Geological Action of the Tidal and other Currents of 

 the Ocean. By Charles Henry Davis, A.M. A.A.S., &c., Lieut. 

 U. S. Navy. Cambridge, 1849. 4to. — From the Author. 



The American Journal of Science and Arts. Conducted by Pro- 

 fessors Silliman and Dana. Vol. VII. No. 21. May, 1849. 

 New Haven. 8vo. — From the Editors. 



The African Repository and Colonial Journal. Vol. XXV. No. 5. 

 May, 1849. Washington. 8vo. — From the American Coloni' 

 zation Society. 



Reports from the Secretary of the Treasury, of Scientific Investiga- 

 tions in relation to Sugar and Hydrometers : made under the Su- 



