PRESIDENTS OF THE SOCIETY. 
JOSEPH HENRY.... .1871-78. 
SIMON NEWCOMB...1879-’80. 
J. J. WOODWARD.. 1881. 
W. B. TAYLOR...1882. 
J. W. POWELL. ..1883. 
J. C. WELLING ..1884. 
ASAPH HALL. 1885. 
J. S. BILLINGS. 1886. 
WM. IIARKNESS...1887. 
GARRICK MALLERY. 1888. 
J. R. EASTMAN. 1889. 
C. E. DUTTON.1890. 
T. C. MENDENHALL. 1891. 
G. K. GILBERT....1892. 
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