224 [December, 1842. 



necessary consequence, a relative augmentation of the earthy material as 

 well as of the fixed carbon, he saw no impropriety in its use, but, on tlie 

 contrary, a peculiar propriety, inasmuch as neither of the other terms in 

 general use to designate mineral fuel is applicable to this variety. He re- 

 ferred to the geological report of the State of Virginia, in which an analysis 

 of this substance is given, exhibiting its composition as follows, viz : 



Carbon, 80.30 



Volatile matter, 9.98 



Ash, 9.72 



BUSINESS BY SPECIAL RESOLUTION. 



Mr. Phillips offered the following Resolution, which was 

 adopted : 



Resolved, That a Committee be appointed to determine 

 the nomenclature of the N. American Naiades, preparatory 

 to their being arranged in the collection of the Academy. 



The Committee consists of Messrs. Phillips, Haldeman, 

 and McFarland. 



STATED MEETING, December 13, 1842. 

 Yice President Morton in the Chair. 



DONATIONS TO LIBRARY. 



A Monograph of the Rhamphastidas. By John Gould. 

 Folio. London, 1842. From Mr. Haldeman, in exchange 

 for other works. 



WRITTEN COMMUNICATIONS. 



A letter was read from M. Arago, Secretary of the Royal 

 Academy of Sciences, of France, dated Paris, September 

 26, 1842, acknowledging the receipt of the Proceedings of 

 the Academy, &c. 



