327 



sizing in the paper. The inside of the jar, where in contact with the 

 papers, was also stained by a black film of sulphuret of lead from the 

 oxide of lead contained in the glass. 



The Society then proceeded to the stated business of the 

 meeting, the balloting for candidates for membership. 



All other business having been concluded, the ballot boxes 

 were opened, and the following named gentlemen were de- 

 clared, by the presiding officer, to be duly elected members of 

 the Society. 



Thomas L. Patterson, Chief Engineer of the Chesapeake 

 and Ohio Canal. 



Henry Grinnell, of New York. 

 John B. Biddle, M.D., of Philadelphia. 



Stated Meeting, May 6. 

 Present, nine members. 

 Judge Kane, Vice-President, in the Chair. 



Letters were read: — 



From Henry Griunell, dated New York, 19th April, 1853:— 

 and from Dr. John B. Biddle, dated Philadelphia, 22d April, 

 1853, — severally acknowledging the receipt of notice of their 

 election as members: — 



From the Imperial Academy of Sciences at Vienna, dated 

 7th October, 1852, returning thanks for No. 47 of the Pro- 

 ceedings of this Society: — 



From the Royal Prussian Academy of Sciences, dated Ber- 

 lin, 11th November, 1852, accompanying a donation for the 

 Library: and — 



Copy of a letter from Dr. J. G, Grunert, Professor of Ma- 

 thematics in the University of Greifswald, to Dr. J. G. Fliigel, 

 of Leipsic, dated Greifswald, 4th January, 1853, on transmit- 

 ting to him two copies of a work written by Di\ Grunert, and 

 requesting Dr. Fliigel to present one of them to this Society. 



