1863. 277 



Stated Meeting, November 20, 1863. 



Present, fifteen members. 



Prof. Cresson, Vice-President, in the Cliair. 



A letter accepting membership was received from Prof. 

 A. Delesse, dated Paris, November 3d, 1863. 



Donations to the Library were received from the Royal 

 Astronomical Society at London, the Department of Agricul- 

 ture at Washington, the Franklin Institute, and Blanehard 

 & Lea of Philadelphia. 



The Secretary announced the deatlis of T. E. Blackwell, of 

 London, and Jacob Grimm, of Berlin, late members of the 

 Society. 



Mr. Cornelius exhibited and explained to the Society his 

 three instruments for lighting gas by means of the Electro- 

 phorus, and also his arrangements for rendering uniform the 

 supply of gas to the burners. 



Messrs'. Cornelius and Briggs made some remarks upon the 

 manufacture of hard rubber, and its use for electrical and 

 other purposes. 



Dr. Coates called the attention of the Society to the so- 

 called tea 'plant of Pennsylvania, and quoted the investiga- 

 tions of M. Maische, to prove that it contained no substance 

 resembling thein. Mr. James said that the plant was doubt- 

 less the Ceanothus Americanus. The discussion of the sub- 

 ject was continued by other members present. 



The minutes of the last meeting of officers and members of 

 Council were read. 



On motion of Mr. Peale, the Curators were authorized to 

 exchange the intestinal calculus in the Cabinet of the Society, 

 for certain stone implements in the Museum of the Uni- 

 versity of Pennsylvania. 



And the Society was adjourned. 



