210 [May, 1847. 



Carolina, with additional drawings of the same. Referred to 

 the Committee on the previous portions of the paper. 



Professor Hare made some observations on the combustion 

 of gum in oxygen gas, and stated that the brilliant light which 

 it emitted during combustion, proceeded from the presence of 

 lime, which he considered an essential constituent of gums. 



Dr. Leidy stated that whilst engaged in examining the 

 structure of some Lichens, he discovered numerous octagonal 

 crystals intermingled with the cellular structure of several 

 species of Parmelia. Many of the crystals equalled in size 

 the greenish cells themselves, although none of them appeared 

 to be contained within the latter. As chemical analysis has 

 detected in these plants a large proportion of oxalate of 

 lime, Dr. Leidy supposed these crystals to be that salt. 



Stated Meeting, May 11, 1847. 

 Mr. Phillips in the Chair. 



DONATIONS TO MUSEUM. 



A large massive specimen of Copper ore from the Fleming- 

 ton Copper Mines, New Jersey. Presented by Dr. Thos. 

 McEuen. 



An earthenware Indian utensil, taken from a crevice in a 

 rock on Pine creek, Lycoming county, Pennsylvania. 

 From Mr Thos. H. Taylor. 



Specimen of Astacus affinis, from Kentucky. From Prof. 

 Haldeman. 



Bituminous coal from the Tippecanoe pit, Clover Hill, Va., 

 and Fuller's earth from the same locality. From Profossor 

 Johnson. 



Mounted specimen of Callipepla squammata, Gould, from 

 Mexico. From Lieut. J. W. Abert, U. S. A. 



