ELIAS HOWE (1819-1867).
ELI WHITNEY (1765-1825).
ALEXANDER GRAHAM BELL
BOOKER T. WASHINGTON
MARK HOPKINS (1802-1887).
SAMUEL F.B. MORSE (1791-1872).
FREDERIC REMINGTON
JAMES FENIMORE COOPER
SAMUEL LANGHORNE CLEMENS
WASHINGTON IRVING
CYRUS HALL MCCORMICK
HENRY WADSWORTH LONGFELLOW
STEPHEN COLLINS FOSTER
LUTHER BURBANK (1849-1926).
JAMES RUSSELL LOWELL
RALPH WALDO EMERSON
CRAWFORD WILLIAMSON LONG
CHARLES WILLIAM ELIOT
WALT WHITMAN (1819-1892).
HORACE MANN (1796-1859).
FRANCES ELIZABETH WILLARD
LOUISA MAY ALCOTT (1832-1888).
DANIEL CHESTER FRENCH
JOHN GREENLEAF WHITTIER
JAMES A. McNEILL WHISTLER
JAMES WHITCOMB RILEY
GILBERT STUART (1755-1828).
EDWARD ALEXANDER MacDOWELL
JAN MATZELIGER (1852-1889).
AUGUSTUS SAINT-GAUDENS
ETHELBERT NEVIN (1862-1901).
GEORGE WASHINGTON CARVER
JANE ADDAMS (1860-1935).
WRIGHT BROTHERS.
SLAVERY: 13TH AMENDMENT.
BENJAMIN BANNEKER
JOHN JAMES AUDUBON
KARL LANDSTEINER (1868-1943).
MARIE CURIE (1867-1934).
GEORGE GERSHWIN (1898-1937).
IDA BELL WELLS (1862-1931).
PAUL LAURENCE DUNBAR
PAUL DUKAS (1865-1935).
ANDRE MARIA AMPERE
CLAUDE BERNARD (1813-1878).
AUGUSTE COMTE (1798-1857). French philosopher. On a French postage stamp, 1957.
1872 ESSAY PROOF.
JAMES MADISON STAMP.
IGNAZ SEMMELWEIS (1818-1865).
GUSTAV ROBERT KIRCHHOFF
JOHN PHILIP SOUSA (1854-1932).
POSTAGE STAMP: BLERIOT.
VICTOR HERBERT (1859-1924).
ELIZABETH BLACKWELL
HARRIET TUBMAN (c1820-1913).
U.S. POSTAGE STAMP, 1869.
U.S. POSTAL CARD, 1902.
'CENTER LINE BLOCK', 1908.
MIGUEL DE CERVANTES
RAINER MARIA RILKE.
LEONARDO DA VINCI
EDISON: TALKING DOLL, c1890.
U.S. STAMP: FRANKLIN, 1898.
ANDRE MARIE AMPERE
ABRAHAM LINCOLN
BERTRAND RUSSELL (1872-1970).
WALTER REED (1851-1902).
KARL FRIEDRICH GAUSS
ENGELS AND MARX.
FRIEDRICH ENGELS (1820-1895).
JOHANN GOTTLIEB FICHTE
U.S. STAMP: FRANKLIN, 1903.
CLARA BARTON (1821-1912).
SUSAN B. ANTHONY (1820-1906).
SAMUEL CLEMENS POSTCARD.
FRANKLIN DELANO ROOSEVELT
U.S. STAMP: FRANKLIN.
HAYM SALOMON (c1740-1785).
GOTTFRIED VON LEIBNIZ
IMMANUEL KANT (1724-1804).
MIGUEL DE CERVANTE
ROBERT H. GODDARD
ALBERT EINSTEIN (1879-1955).
CHIEF JOSEPH (1840-1904).
POSTAGE STAMP, 1856.
GADSDEN PURCHASE
JOSE de ANCHIETA (1533-1597).
HERNANDO DE SOTO
EDISON: STOCK PRINTER, c1873.
PONY EXPRESS: STAMP, 1940.
JEAN HENRI FABRE (1823-1915).
SOREN KIERKEGAARD
WILLA CATHER (1873-1947).
EDWARD JENNER (1749-1823).
EDISON'S LIGHT BULB.
EDISON'S LIGHT BULB, 1879.
POSTAGE METER PROOF, 1903.
LOUISIANA PURCHASE, 1803.
A. ELEANOR ROOSEVELT.
SIMONE WEIL (1909-1943).
ROBERT FALCON SCOTT
GEORGES MELI S (1861-1938).
KING GEORGE VI STAMP, 1943.
GUILLAUME DE MACHAUT
TYCHO BRAHE (1546-1601).
JOSEPH PRIESTLEY (1733-1804).
LAZZARO SPALLANZANI
BARTOLOMEU DIAS
SIR MARTIN FROBISHER
VASCO da GAMA (1469?-1524).
HENRY HUDSON (d. 1611).
WINSTON CHURCHILL
D.W. GRIFFITH (1875-1948).
STANTON, CATT & MOTT.
SAM HOUSTON (1793-1863).
INDIA: POSTAGE STAMP.
OLIVER EVANS (1755-1819).
JEAN-FRANCOIS CHAMPOLLION
BARUCH SPINOZA (1632-1677).
ANDRE MALRAUX (1901-1976).
HEINRICH HERTZ (1857-1894).
EDISON'S PHONOGRAPH, 1877.
JOHN CABOT: MATHEW, 1949.
SOUTH AFRICA: STAMP, 1938.
ITALIAN STAMP, 1959.
GEORGE WASHINGTON.
FRANCISCO PIZARRO
BERNARDO de GALVEZ
STAMP: PANAMA CANAL.
BENJAMIN FRANKLIN (1706-1790).
JOSE de ANCHIETA (1534-1597).
HOMESTEAD ACT
FIRST POSTAGE STAMPS.
ROBERTO CLEMENTE
JACKIE ROBINSON (1919-1972).
JOS GALVEZ (1729-1787).
PONY EXPRESS COVER, 1861.
U.S. POSTAGE STAMP, 1893.
GLEN ALLEN STAMP, 1886.
STAMP: BICYCLE POST, 1894.
EMILE BERLINER (1851-1929).
THOMAS EDISON (1847-1931).
ELWOOD HAYNES (1857-1925)
SPIRIT OF 76.
MARTIN BUBER (1878-1965).
FIRST POSTAGE STAMP, 1842.
US POSTAGE STAMP, 1847.
MOHAMMED DAUD KHAN
GERHARD HANSEN (1841-1912).
HEINRICH HEINE (1797-1856).
THOMAS DAVENPORT
AUSTRALIAN ENVELOPE, 1838.
POSTAGE STAMP, 1918.
U.S. POSTAGE STAMP, 1901.
SPAIN: NATIONAL LIBRARY.
NAINI JUNCTION STAMP, 1911.
OTTMAR MERGENTHALER
JOHN DEWEY (1859-1952).
SUN YAT-SEN (1866-1925).
LUIZ VAS de CAMOES
AMELIA EARHART (1897-1937).
SIR HENRY MORGAN
MARTIN LUTHER KING, JR.
ANNE FRANK (1929-1945).
AVICENNA (IBN-SINA)
AVICENNA, (IBN-SINA)
PEDRO ALVARES CABRAL
GIOVANNI DA VERRAZZANO
GIL EANES (fl. 15th CENTURY).
STAMP, 1845.
CONFEDERATE STAMPS, 1863.
MULREADY ENVELOPES, 1840.
PEDRO MENENDEZ DE AVILES
GEORGE WESTINGHOUSE