62 TRANSACTIONS OF THE [DEc. 2, 
common agents, such as carbonated atmospheric waters, sul- 
phuric acid and sulphate of zinc, produced by the decay of the 
blende and from the action of the silica in the original limestone. 
The speaker did not attempt to illustrate the matter further, but 
cited it as an interesting subject for experiment and investiga- 
tion. The paper was illustrated with numerous specimens and 
with the lantern. Discussion by the Chairman and others 
followed. 
The Academy then adjourned. 
J. F. Kemp, Secretary. 
Pustic LECTURE. 
November 25th, 1895. 
The first public lecture of the course of 1895-6 was delivered 
at the Law School of Columbia College by Mr. Cornelius Van 
Brunt, on * The Natural Flora of Bronx Park.” 
The lecturer only treated of the flowering plants. His re- 
marks were illustrated by a large series of beautifully colored 
lantern slides, and was of especial interest on account of the 
close association of the Academy with the newly organized New 
York Botanical Garden, which will occupy Bronx Park. 
About 150 people were present. 
J. F. Kemp, Secretary. 
STATED MEETING. 
December 2d, 1895. 
The meeting was called to order, President Rees, in the chair. 
There were about twenty-five members and guests present. 
In the absence of the Secretary, W. Hallock was appointed 
Secretary pro tem. Minutes of preceding meeting were read 
and approved. 
