1894. ] NEW YORK ACADEMY OF SCIENCES. 67 
Arnold Graf, “On the Excretory System and on the Origin 
of Pigment in Nephelis and Clepsine.” 
Meeting adjourned. , 
BAsHFORD DEAN, 
Recording Secretary of Biological Section. 
STATED MEETING. 
December 17th, 1894. 
The Section of Geology and Mineralogy at once organized. 
Twelve persons present. 
In the absence of the chairman, Dr. L. H. Laudy was called 
to the chair. The minutes of the last meeting of the Section 
were read and approved. 
Prof. D. 8S. Martin presented a report from the Committee on 
Standard Sizes, and on motion the report was accepted and re- 
ferred to the Committee on Publication, and the committee was 
discharged. 
~The first paper of the evening was by J. A. Matthews, entitled 
“Notes on Carborundum.” The paper was illustrated by many 
specimens, and was discussed by Messrs. Laudy, Levison, 
Luquer, Martin and Kemp. It will appear in the School of 
Mines Quarterly of current date. 
The second paper was by Dr. Bashford Dean, “ On the 
Mounds and Mound-builders of Ohio,” and was discussed by 
Dr. Martin. 
The third paper was by Mr. L. MclI. Luquer, * On the relative 
Effects of Frost and Sulphate of Soda Efflorescence as shown by 
tests of Building Stones.” The paper will appear in the School 
of Mines Quarterly. 
After discussion by several members the Academy adjourned. 
J. F. Kemp, 
Recording Secretary. 
