1882. 105 trans. WN. Ve Ac. Sci. 
locality has been more than repaid by the sales of the gems (Hiddenites) 
discovered. But for the liberal financial aid given to the writer by both 
Mr. RICHARD H. ROBERTS, of Albany, and Mr. JAMES D. YERRING- 
TON, of Cresskill, N. J., the work of discovery and development at this 
locality would have been very much retarded, if not indefinitely post- 
poned. 
DISCUSSION. 
Dr. NEWBERRY remziked on the extreme beauty of the specimens 
exhibited by Mr. HIDDEN, and the great interest of these discoveries, 
in which he had achieved such signal success, both practical and 
scientific. 
Dr. R. P. STEVENS made some further remarks on, the communica- 
tion, comparing the aspect of the specimens, and the mode of their 
occurrence, with those of the emeralds from the celebrated locality 
near Bogota. He referred to the fact, also, that the Bogota mines had 
been worked by the early aborigines, and were doubtless the source of 
the emeralds described with so much enthusiasm by the Spanish histori- 
ans of the conquest of Peru. 
Mr. GEORGE F. KUNZ exhibited a remarkable series of prehistoric 
knives, flakes, and cores, of Obsidian, from the vicinity of the city of 
Guatemala, Central America. ‘They were obtained by the partial cut- 
ting away of a mound, during the making of a new road, about six 
miles from the city. The excavation revealed a sort of little cyst or 
chamber, walled and roofed with slabs of stone or baked clay, within 
which this large quantity of obsidian knives had been carefully and 
quite regularly laid away. There was scarcely anything else in the 
chamber, but the broken and worn edges of many of the implements 
would indicate that they had been much used; and the suggestion is 
strong that this may have been a sacrificial mound, and that these were 
the implements used in the rites of sacrifice, perhaps for a long period. 
Feb. 6, 1882. 
REGULAR BusINESS MEETING. 
The President, Dr. J. S. NEWBERRY, in the Chair. 
Forty-five persons present. 
The following named gentlemen, on recommendation of the 
Council, were elected resident members : 
A. D. CHURCHILL. Joun TOWNSEND. 
The Committee appointed at a previous meeting, to prepare 
resolutions appropriate to the recent death of Dr. J. W. Draper, 
