326 TRANSACTIONS OF TBE [maY 17, 



The third paper was by Professor Kemp, entitled " Notes on 

 the Geology of the Trail from Red Rock, Montana, to and be- 

 yond Leesburg, Idaho." This paper consisted of a series of 

 notes upon the rocks that appear along the trail mentioned, one 

 hundred miles or so of which had never been previously de- 

 scribed from a geological standpoint. The highlands consist 

 of ancient Cambrian or pre-Cambrian quartzite, which is cut near 

 the Idaho line by rhyolites. The valleys of the Lemhi and the 

 Salmon rivers near Salmon City are occupied b}' Tertiary- lake 

 beds, with terraces showing lignites. West from Salmon City 

 there is much hydraulic mining for gold at the old camp of 

 Laesburgh. The region visited connected with that traversed 

 by G. H. Eldredge and lapped over it west of Salmon City, 

 but not east of that place. (See " A Reconnaissance across 

 Idaho," XYI. Ann. Rep. Dir. U. S. Geol. Survey.) 



The last paper was by Professor C. A. Doremus, entitled " An 

 Exhibition of the Metals, Carbides, etc., obtained by M. Moissan 

 with the Electric Furnace," Dr. Doremus exhibited some fifteen 

 specimens of metals and their carbides which had just been re- 

 ceived from M. Moissan, for placement in the National Museum 

 at Washington, D. C. These metals represent the best results 

 attained by M. Moissan in his experiments "with the electric fur- 

 nace, and include among the metals, chromium, titanium, whose 

 chemical affinity varies in accordance with the amperage of the 

 furnace; tungsten, molybdenum, vanadium, uranium. The car- 

 bides shown were those of aluminium, calcium and cerium. The 

 borides of carbon, iron and cobalt were also exhibited. 



Meeting adjourned at 10:45. 



Richard E. Dodge, 



Secrelary. 



