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Section II. Physics. 
A. D. BAcnE. W. H. C. Bartterrt. 
F. A. P. Barnarp. A. A. Humpureys. 
Josepu Henry. Wm. B. Rogers. 
Section IIL. Astronomy, Geography, and Geodesy. 
STepHEN ALEXANDER. ALEXIS CASWELL. 
J. H. C. Corrin. Cuarves H. Davis. 
J. M. Griuyiss. Bens. A. Gouin. 
ARNOLD Guyor. Lewis M. Rornerrurp. 
Joun Ropaers. 
Section IV. Mechanics. 
J. H. ALEXANDER. J. F. Frazer. 
J. E. Hitgarp. D. H. Manan. 
FarrMAN RoGeErRs. JOSEPH SAXTON. 
Section V. Chemistry. 
Wo corr Gress. Bens. SILLIMAN, JR. 
OHN TORREY. 
CLASS OF NATURAL HISTORY. 
Section I. Mineralogy and Geology. 
J. P. Lesrey. Leo Lesquerevx. 
James Hau. J. S. Newperry. 
Bens. Surin, Sr. J. D. Wuitney. 
Section Il. Zodlogy. 
Louis AGAssiz. James D. Dana. 
Spencer F, Barrp. AvGustus A. Goutp. 
Joun L. Leconte. 
