142 
N. Y., Prof. R. D. Irving, of Madison, Wis, Prof. G. 8. 
Roberts, of Grinnell, Iowa, Prof. T. G. Wormley, of Colum- 
bus, Ohio., Prof. A. A. Wright, of Oberlin, Ohio, Prof. J. 
Aitken Meigs, of Philadelphia, Penn., Dr. Edward Foreman, 
of Catonsville, Md. 
On ballot, these gentlemen were all duly elected. 
Mr. J. Waterhouse Hawkins, having informed the Lyceum 
of his removal from the city, was transferred to the list of 
corresponding members. 
Other business haying been finished,— 
THE PRESIDENT remarked upon the paper of Prof. C. H. 
Hitchcock, on the geology of New England, in the American 
Journal of Science for May, and expressed some dissent from 
the views therein set forth as to glacial action. 
Pror. STEVENSON and Pror. Wurtz discussed the 
phenomena presented by the action of ancient glaciers, as 
observed by them respectively in the southern portion of the 
Rocky Mountains, and among the trap ranges in the vicinity 
of New York. 
May 11th. Chemical Section. 
PRESIDENT NEWBERRY in the chair. Twenty persons present. 
Pror. ALBERT R. LEEDS exhibited some specimens, 
brought from Dakota Territory, of a greenish earth, which 
the aborigines, and latterly the whites, have used for washing, 
under the name of ‘natural soap.’ It has a greasy feel and 
soapy taste, and consists of 18 per cent. of water and organic 
matters, and the remainder of silica, ete. Also some speci- 
mens from Copper Falls, Mich., of a yellow metal, sometimes 
mistaken for gold, which is found there among the stamp 
copper, and which proves to be an alloy of copper and zine, 
in fact a natural brass. A mineral from Conshohocken, Pa., 
