THOMAS EDISON (1847-1931).
THOMAS ALVA EDISON (1847-1931).
THOMAS A. EDISON (1847-1931).
THOMAS EDISON (1847-1931)
EDISON & STEINMETZ, 1922.
NEWTON D. BAKER (1871-1937).
Thomas Alva Edison (1847-1931), American Inventor, half-length seated Portrait, Louis Bachrach, Bachrach Studios, 1922
Thomas Alva Edison (1847-1931), American Inventor, half-length Portrait, Louis Bachrach, Bachrach Studios, 1922
Thomas A. Edison with Phonograph, Engraving, circa 1888
CARL SAGAN (1934-1996).
CHARLES ROBERT DARWIN
LIN YU-T'ANG (1895-1976).
ROBERT FULTON (1765-1815).
LEE DE FOREST (1873-1961).
BENJAMIN FRANKLIN (1706-1790).
FRANK HARRIS (1854-1931).
JOHN HUNTER (1728-1793).
CHARLES DARWIN (1809-1882).
SELMAN WAKSMAN (1888-1973).
ALBERT ABRAHAM MICHELSON
WILLIAM JENNINGS BRYAN
JOSEPHUS DANIELS (1862-1948).
RUPERT BLUE (1868-1948).
EDISON WITH HIS FAMILY.
WILLIAM HICKLING PRESCOTT
Walter Rittman, US chemical engineer
LUTHER BURBANK (1849-1926).
HENRIETTA SWAN LEAVITT
ALBERT SCHWEITZER
FLORENCE SABIN (1871-1953).
SIR CHARLES LYELL
JOHN WORRALL KEELY, c1895.
THOMAS KUCHEL (1910-1994).
SAMUEL LANGHORNE CLEMENS
ALEXANDER BERKMAN
JOEL CHANDLER HARRIS
ALEXANDER GRAHAM BELL/n(1847-1922).
MARGARET MEAD (1901-1978).
GEORGE SUTHERLAND
SAMUEL PIERPONT LANGLE
SAMUEL PIERPONT LANGLEY
ALEXANDER von HUMBOLDT
THOMAS BABINGTON MACAULAY
IRVINE LENROOT (1869-1949).
BOOKER T. WASHINGTON
WILLIAM HOWARD TAFT
THEODORE ROOSEVELT
WOODROW WILSON (1856-1924).
LEON TROTSKY (1879-1940).
The Effects of Good Government in the City
NACA, 1938
SIR CHARLES WHEATSTONE
SILENT FILM STILL: OFFICES.
BRAILLE TYPEWRITER, 1974.
VERNON L. KELLOGG (1867-1937).
THEODOSIUS DOBZHANSKY
Thomas Alva Edison (1847-1931)
DAVID WECHSLER (1896-1981).
SIR FRANCIS GALTON
JOHN WYCLIFFE (1320?-1384).
SAINT ROBERT BELLARMINE
COUNT KEYSERLING (1880-1946).
GEORGE WASHINGTON GOETHALS
JOSEPH CONRAD (1857-1924).
BEN AMES WILLIAMS
KENNETH ROBERTS (1885-1957).
ELIHU ROOT (1845-1937).
SELMA LAGERL F (1858-1940).
SIR ARTHUR CONAN DOYLE (1859-1930).
Berlin, Germany: July 25, 1923.A portrait of Danish scholar, critic, and philosopher, George Brandes at his desk.
MARIE CURIE (1867-1934).
WILL H. HAYS (1879-1954).
Herbert Gasser, American physiologist
Barbara McClintock, US cell geneticist
SCHOLAR, 17th CENTURY.
PIERRE E.M. BERTHELOT
CHRISTOPHER COLUMBUS
PIERCE BUTLER (1866-1939).
ROBERT F. KENNEDY
JOHN BURROUGHS (1837-1921).
JERRY VOORHIS (1901-1984).
Samuel Lind, US chemist
Leo Esaki, Japanese physicist
THOMAS EDWARD LAWRENCE
BRIGHAM YOUNG (1801-1877).
NIKOLA TESLA (1856-1943).
Anna Julia Cooper, US scholar and civil rights activist
CHARLES DURYEA (1862-1938).
WILLIAM McKINLEY (1843-1901).
GEORGE NELSON PEEK
HENRI DE BLOWITZ
BENJAMIN HARRISON
THOMAS H. HUXLEY
SAMUEL GOMPERS (1850-1924).
MICHAEL IDVORSKY PUPIN
MABEL HUBBARD BELL (1857-1923).
Inventor Watching His 3' TV
CLERKS, 1884.
WILLIAM S. DEVERY (1854-1919).
Chauffeurs Relax To Radio
A man working in an office holding his smart phone and checking his computer.
HENRY CLAY FRICK (1849-1919).
JOHN EDGAR HOOVER
CENSUS TABULATOR, c1908.
DWIGHT D. EISENHOWER
HARRY S. TRUMAN
JOHN F. KENNEDY