Columbia subject headings:
Electromagnetism--History.
Henry, Joseph, 1797-1878.
Physicists--United States--Biography.
Science--United States--History.
Harvard subject headings:
Electromagnetism--History.
Henry, Joseph, 1797-1878.
Physicists--United States--Biography
Science--United States--History
Princeton subject headings:
Electromagnetism--History.
Henry, Joseph, 1797-1878.
Physicists--United States--Biography.
Science--United States--History.