3893.) - NEW YORK ACADEMY OF SCIENCES. 69 
January 16, 1893. 
Stratep Merertinea. 
One hundred persons present. 
In the absence of the president Mr. Garrerrson presided and 
introduced Prof. Cuartes R. Cross, of the Massachusetts 
Institute of Technology, who delivered an illustrated lecture on 
‘“«The Determination and Recent History of Musical Pitch, 
especially in this Country.” 
At the close of the discourse a vote of thanks was tendered 
-the lecturer. 
January 23, 1893. 
Statep MeEEetinc. 
SECTION OF GEOLOGY AND MINERALOGY, 
The Section was called to order by the Chairman, Prof. 
“WuirtFiIELp, at 8:10 p. m., with fifteen members present. 
The following papers were read : 
Dr, J. L. Worrman, ‘‘ The Relationship of the Puerco Beds 
to the Laramie.” 
The speaker described the interesting faunal and physical 
relations of the two, basing his remarks on personal observa- 
tions in northwestern New Mexico, and in Wyoming. The 
paper was discussed by Professors Kemp, Wurrrietp, and 
others. 
Professor A, J. Moszs, ‘‘ Rare Faces on Pyrite Crystals, from 
the Kingsbridge Ship Canal,’ and upon ‘‘ An apparently new 
Sulphate from Arizona.’’ 
The pyrite crystals were associated with muscovite and quartz 
in a cavity in a limestone block that was quarried from the 
eastern end of the ship canal. They rarely exceeded { inch 
-in longest dimension, and were octahedra modified by cube, 
pyritohedron, i-2, and diploid 3-3. Faces of the tetragonal 
