IOWA ACADEMY OF SCIENCE 
OFFICERS OF THE ACADEMY. 
1906. 
President — C. O. Bates. 
First Vice-President — G. E. Finch. 
Second Vice-President — A. A. Bennett. 
Secretary — L. S. Ross. 
Treasurer — H. E. Summers. 
EXECUTIVE COMMITTEE. 
Ex-Officio — C. 0. Bates, G. E. Finch, A. A. Bennett, L. S. 
Ross, H. E. Summers. 
Elective— H. M. Kelley, F. F. Almy, C. F. Lorenz. 
1907. 
President — John L. Tilton. 
First Vice-President — C. L. Von Ende. 
Second Vice-President — Nicholas Knight. 
Secretary — L. S. Ross. 
Treasurer — H. E. Summers. 
EXECUTIVE COMMITTEE. 
Ex-Officio — John L. Tilton, C. L. Von Ende, Nicholas Knight, 
L. S. Ross, H. E. Summers. 
Elective — L. Begeman, J. Fred Clarke, R. B. Wylie. 
PAST PRESIDENTS. 
Osborn, Herbert 1887-88 
Todd, J. E 1888-89 
Witter, F. M 1889-90 
Nutting, C. C.. 1890-92 
Pammel, L. H ........ 1893 
Andrews, L. W 1894 
Norris, H. W 1895 
Hall, T. P ..1896 
Franklin, W. S ...................... 1897 
Macbride, T. H 1897-98 
Hendrixson, W. S 1899 
Norton, W. H 1900 
Veblen, A. A. ................................. 1901 
Summers, H. E 1902 
Fink, Bruce ...... 1903 
Shimek, B. 1904 
Arey, M. F..... 1905 
Bates, C. O 1906 
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