by Robert Ervie McConnell, University of Iowa

1930

by University of Pennsylvania. Harrison foundation

1908

by Iowa State University

1906

by Ohio State University

1908

by University of Oklahoma. University Extension Division. Dept. of Visual Education

1923

by University of Michigan club of Chicago

1928

by United States. National Aeronautics and Space Administration. Office of University Affairs

by Columbia University. Libraries

1901

by Yale University. Library

1901

by University of Illinois. Museum of Natural History

1920

by Princeton University. Library

1920

by University of Southern California

1930