CLARK, E. B., a,
Geological Survey. Laurel, Md.
COLONNA, B. A.,
Coast and Geodetic Survey. 23 Grant Place.
COLVIN, VERPLANCK, a,
Albany, New York.
COURT, E. E.,
Hydrographic Office. Seventeenth Street, Mt. Pleasant.
CRAVEN, ENS. JOHN E., U. S. N.,
Hydrographic Office. 1313 Twenty-second Street.
CUMMIN, R. D., a,
Geological Survey. 1105 Thirteenth Street.
CURTIS, WILLIAM ELEROY, a,
513 Fourteenth Street. 1801 Connecticut Avenue.
DARWIN, CHAS. C., a,
Geological Survey. 1907 Harewood Avenue, Le Droit Park.
DAVIDSON, PROF. GEORGE, a,
U. S. Coast and Geodetic Survey, San Francisco, Cal.
DAVIS, ARTHUR P., a,
Geological Survey. 1910 Larch Street, Le Droit Park.