Trans. N. Y. Ac. Sci. 2 Oct. 8, 
The PRESIDENT remarked that the Isle Royale Mine was the 
second locality in the Lake Superior region at which the copper 
sulphide has yet been found. The carbonate and silicate of cop- 
per occurred there only in crusts, while the native silver and cop- 
per, whose abundance is well known, are precipitates from chemi- 
cal solution by electrolysis. 
Prof. MARTIN mentioned the recent death, at Hamburg, of Dr. 
Tueopore H. TELLKAMPF, a member of the Academy, and re- 
ferred to his valuable studies and papers on the ascidians of our 
coast. 
Mr. A. R. ConKk inc briefly explained the Patio and Cazo Pie 
cesses for amalgamating silver ores. 
The PRESIDENT suggested that the costly mills and stamps, now 
used for reducing silver ores, must give way largely to simpler and 
cheaper machinery and methods employed in the leaching 
process. 
October 8, 1883. 
SECTION OF PuysIcs. 
The President, Dr. J. S. NEwBERRY, in the Chair. 
Sixty-five persons present. 
Mr. B. B. CHAMBERLIN exhibited a specimen of graphite from a 
boulder found on the bluff at Weehawken, the first discovered in 
the vicinity of this city, and probably derived from the outcrop 
at Bloomingdale, N. J.,—also specimens of graphite from Hull, 
Canada; Mr. G. F, Kunz, a curious specimen of capped or 
penetrated beryl, in which a pyramidal crystal of that mineral was 
enclosed within another of the common hexagonal form, from the 
topaz locality at Stoneham, Me. ; and the PRESIDENT, a specimen 
of native lead from the Wood River region of Idaho, the mineral 
occurring in the upper portions of the veins, associated with red 
oxide of lead, and solid unchanged galena, in masses of quite 
unprecedented size. 
The recent death of a Resident Member, Mr. H. G. CHAPMAN, 
was announced, and also, in last August, of Mr. EDWARD PRIME 
of Riverdale, one of the early members and a subscriber to the 
original building fund. 
