Results for "African Americans -- Washington (D.C.)"
Robert Ridgway's Drawing of a Junco
- Date: c. 1900
- Creator: Ridgway, Robert 1850-1929
- Creator: Ridgway, Robert 1850-1929
Joseph Henry Electromagnet
- Date: c. 1978
Joseph Henry's Letter to Alexander Dallas Bache (October 3, 1863)
- Date: October 3, 1863
- Creator: Henry, Joseph 1797-1878,Joseph Henry Papers Project
- Creator: Henry, Joseph 1797-1878,Joseph Henry Papers Project
Joseph Henry's Yale Magnet
- Date: 1974
- Creator: Harrell, Alfred
- Creator: Harrell, Alfred
Joseph Henry's Oscillating Electromagnet Motor
- Date: c. 1830s
- Creator: Henry, Joseph 1797-1878
- Creator: Henry, Joseph 1797-1878
Joseph Henry's Letter to Alexander Dallas Bache (November 12, 1843)
- Date: November 12, 1843
- Creator: Henry, Joseph 1797-1878,Joseph Henry Papers Project
- Creator: Henry, Joseph 1797-1878,Joseph Henry Papers Project
Electromagnet Made by Joseph Henry
- Date: 1978
- Creator: Unknown
- Creator: Unknown
Robert Ridgway's Drawing of a Robin
- Date: c. 1900
- Creator: Ridgway, Robert 1850-1929
- Creator: Ridgway, Robert 1850-1929
Joseph Henry's Albany Magnet with its Battery and Apparatus for Measuring its Strength
- Date: 1831
- Creator: Unknown
- Creator: Unknown
Joseph Henry's Letter to James Lenox (March 18, 1845)
- Date: March 18, 1845
- Creator: Henry, Joseph 1797-1878,Joseph Henry Papers Project
- Creator: Henry, Joseph 1797-1878,Joseph Henry Papers Project
Cover of Alfred Vail's Experiment Notebook
- Date: c. 1844
- Creator: Vail, Alfred
- Creator: Vail, Alfred
Charles Phillips Letter to Joseph Henry (June 14, 1845)
- Date: June 14, 1845
- Creator: Phillips, Charles,Joseph Henry Papers Project
- Creator: Phillips, Charles,Joseph Henry Papers Project
