by Cambridge University Library

1905

by Cambridge University Library

1913

by Ohio State University. Alumni Association

1926

by Stanford University Stanford Electronics Laboratories

1958

by Ohio State University. College of Agriculture. Extension Service

1921

by Yale University

1921

by Yale University

1922

by Oklahoma State University

1930

by Kansas State University

1920

by University of Arkansas (Fayetteville campus)

1894

by Arthur Newell Talbot, Mikishi Abe, University of Illinois (Urbana-Champaign campus). Hydraulic Laboratory, Harrison Frederick Gonnerman

1918

by University of Colorado (Boulder campus)

1921