IOWA ACADEMY OF SCIENCE 
Officers of the Academy 
1916- 1917. 
President — Professor G. W. Stewart, State University. 
First Vice-President — Professor L. S. Ross, Drake University. 
Second Vice-President — Miss Alt so a E. Aitchison, State 
Teachers College. 
Secretary — James H. Lees, Iowa Geological Survey. 
Treasurer — Professor A. O. Thomas, State University. 
executive committee. 
Ex-officio — G. W. Stewart, L. S. Ross, Miss Aitchison, James H. Lees, 
A. O. Thomas. 
Elective — S. W. Beyer, Iowa State College; E. A. Jenner, Simpson 
College; D. W. Morehouse, Drake University. 
1917- 1918. 
President — Professor L. S. Ross, Drake University. 
First Vice-President — Professor S. W. Beyer, State College. 
Second Vice-President — Professor C. E. Seashore, State Uni- 
versity. 
Secretary — James H. Lees, Iowa Geological Survey. 
Treasurer — Professor A. 0. Thomas, State University. 
EXECUTIVE \ COM MITTE E . 
Ex-officio — L. S. Ross, S. W. Beyer, C. E. Seashore, James H. Lees, 
A. O. Thomas. 
Elective — Professor Nicholas Knight, Cornell College; Professor H. 
E. Jaques, Parsons College; Mr. R. I. Cratty, Armstrong. 
PAST PRESIDENTS 
Osborn, Herbert 1887-1888 
Todd, J. E. 1888-1889 
Witter, F. M 1889-1890 
Nutting, C. C. (2 terms) 1890-1892 
Pammel, L. H 1892-1893 
Andrews, L. W 1893-1894 
Norris, H. W. (1 term) 1894-1896 
Hall, T. P. 1896 
Franklin, W. S 1896-1897 
Macbride, T. H 1897-1898 
Hendrixson, W. S 1898-1899 
Norton, W. H 1899-1900 
Vkblen, A. A 1900-1901 
Summers, H. E 1901-1902 
Fink, Bruce 1902-1904 
Shimek, B 1904-1905 
Arey, M. F 1905-1906 
Bates, C. 0 1906-1907 
Tilton, John L 1907-1908 
Calvin, Samuel 1908-1909 
