by Delaware. State Board of Agriculture

1906

by University of Delaware. Division of Agricultural Extension

1915

by Delaware. General Assembly. House of Representatives

1917

by Delaware

1887

by Delaware

1909

by University of Delaware

1923

by Delaware. State Board of Education

1889

by George Lee Schuster, James Fowler Adams, Lester W. Tarr, University of Delaware. Agricultural Experiment Station, George L. Baker

1922

by Delaware. Commissioners, Jamestown Exhibition, 1907

1907

by University of Delaware. Agricultural Experiment Station

1904

by University of Delaware. Agricultural Experiment Station

1922

by University of Delaware. Agricultural Experiment Station

1900