Results for "African Americans -- Washington (D.C.)"
Joseph Henry Constructs an Electric Motor
- Date: April-July 1831
Smithsonian Budgets $1,000 for Meteorology Program
- Date: March 19, 1848
W. Duane Hope Holding a Petri Dish
- Date: 1975
- Creator: Sandved, Kjell Bloch 1922-
- Creator: Sandved, Kjell Bloch 1922-
Curator W. Duane Hope at Microscope
- Date: 1975
- Creator: Sandved, Kjell Bloch 1922-
- Creator: Sandved, Kjell Bloch 1922-
Joseph Henry Constructs Large Electromagnet for Yale College Professor Benjamin Silliman
- Date: January 15, 1831
Joseph Henry Begins His "Record of Experiments"
- Date: August 15, 1834
Dr. Edward S. Ayensu
- Date: 1975
- Creator: Sandved, Kjell Bloch 1922-
- Creator: Sandved, Kjell Bloch 1922-
Dr. Edward S. Ayensu
- Date: 1975
- Creator: Sandved, Kjell Bloch 1922-
- Creator: Sandved, Kjell Bloch 1922-
Dr. Edward S. Ayensu
- Date: 1975
- Creator: Sandved, Kjell Bloch 1922-
- Creator: Sandved, Kjell Bloch 1922-
Dr. Edward S. Ayensu
- Date: 1975
- Creator: Sandved, Kjell Bloch 1922-
- Creator: Sandved, Kjell Bloch 1922-
Leland B. Clark, Division of Radiation and Organisms
- Date: c. 1935
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
Science Display
- Date: c. 1930s
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
- Creator: Tolman, Ruel P (Ruel Pardee) 1878-1954
