by Minnesota

1887

by Geological and Natural History Survey of Minnesota

1893

by University of Minnesota. Board of regents

1890

by Minnesota Historical Society

1915

by Minnesota Academy of Science, Minneapolis

1873

by University of Minnesota

1922

by University of Minnesota. President

1922

by University of Minnesota. Mines Experiment Station

1913

by Minnesota Academy of Natural Sciences

1910

by Minnesota Academy of Sciences (Minneapolis)

1874