Results for "African Americans -- Washington (D.C.)"
W. Duane Hope with Microscope
- Date: 1975
- Creator: Sandved, Kjell Bloch 1922-
- Creator: Sandved, Kjell Bloch 1922-
Glass Test Tube In Scientific Laboratory
- Date: c.1930s
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
Leland B. Clark of the Division of Radiation and Organisms
- Date: c. 1935
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
Scientific Experiment, Division of Radiation and Organisms
- Date: c. 1930s
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
Leland B. Clark Working in the Division of Radiation and Organisms
- Date: c. 1935
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
Wilkes Expedition Collections Transferred from Patent Office to Smithsonian
- Date: March 3, 1857
Full View of Scientific Experiment, Division of Radiation and Organisms
- Date: c. 1930s
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
Glass Test Tube Used for Scientific Experiment
- Date: c. 1930s
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
Science Display
- Date: c. 1930
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
Joseph Henry Demonstrates His First Telegraphic Apparatus, a Bell-Ringer
- Date: 1831-1832
Florence E. Meier Chase
- Date: c. 1935
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
Charles G. Abbot's Solar Panels
- Date: c. September 30, 1936
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
