HENRI BERGSON (1859-1941).
EDUARD VON HARTMANN
MARTIN BUBER (1878-1965).
MARTIN HEIDEGGER
KARL JASPERS (1883-1969).
IMMANUEL KANT (1724-1804).
GEORGE WILHELM HEGE
LEO TOLSTOY (1828-1910).
JOHN STUART MILL
MAIMONIDES (1135-1204).
Signature of Baruch Spinoza.
SOREN KIERKEGAARD
Henri-Louis Bergson, 1859 1941
BERTRAND RUSSELL
ROBERT CHAMBERS (1802-1871).
RALPH WALDO EMERSON
KARL MARX (1818-1883).
ARTHUR SCHOPENHAUER
JEREMY BENTHAM (1748-1832).
JOHANN GOTTLIEB FICHTE
ERNST MACH (1838-1916).
FRIEDRICH W.J. von SCHELLING
GOTTHILF VON SCHUBERT
HENRY DAVID THOREA
Michael Faraday
WILLIAM H. BRAGG (1862-1942).
SIGMUND FREUD (1856-1939).
GOTTFRIED von LEIBNIZ
RENE DESCARTES (1596-1650).
THOMAS HOBBES (1588-1679).
HENRI LEON LEBESGUE
BENJAMIN FRANKLIN (1706-1790).
JULES HENRI POINCARE
JOHANN GOTTFRIED von HERDER
THOMAS PAINE (1737-1809).
BARUCH SPINOZA (1632-1677).
VOLTAIRE SIGNATURE.
Immanuel Kant's signature.
Henri Bergson.
Signature of Emanuel Swedenborg.
WALT DISNEY (1901-1966).
ANDRE MARIE AMPERE
GEORG CANTOR (1845-1918).
MICHEL EUGENE CHEVREUL
THOMAS GRAHAM (1805-1869).
KARL FRIEDRICH GAUSS
FRIEDRICH W HLER (1800-1882).
Samuel Taylor Coleridge
Robert Macnish
William Godwin
SIR CHARLES LYELL
SIR HUMPHRY DAVY (1778-1829).
SIR HUMPHRY DAVY
JOHN WESLEY POWELL
SAMUEL GEORGE MORTON
JOHN TYNDALL (1820-1893).
THOMAS YOUNG (1773-1829).
HENRI POINCARE (1854-1912).
SVANTE AUGUST ARRHENIUS
MAX PLANCK (1858-1947).
MARIE CURIE (1867-1934).
JOHN DEWEY (1859-1952).
EDMUND HUSSERL (1859-1938).
EDWARD B. TITCHENER
J.H. HOFF (1852-1911).
SIR WILLIAM RAMSAY
JOHN HERSCHEL (1792-1871).
PRINCE KROPOTKIN (1842-1921).
Charles Sanders Peirce, US philosopher
HENRY CAVENDISH (1731-1810).
CABEZA DE VACA (c1490-c1557).
GEORGE BERNARD SHAW
MOSES MENDELSSOHN
SIR MARTIN FROBISHER
KARL WILHELM SCHEELE
JEAN BAPTISTE ANDR DUMAS/n(1800-1884).
JOHN BURROUGHS (1837-1921).
CARL SANDBURG (1878-1967).
ERNEST RUTHERFORD
JOHN JACOB ASTOR (1763-1848).
IVAN TURGENEV (1818-1883).
JACQUES CARTIER (1491-1557).
LORD KELVIN (1824-1907).
IDA LAURA PFEIFFER
JOHN D. ROCKEFELLER
MAX BORN (1882-1970).
JOSEPH LISTER (1827-1912).
DAVY CROCKETT SIGNATURE.
Signature of Charles Darwin.
Signature of Louis Pasteur.
THOMAS MANN (1875-1955).
SIR RONALD ROSS (1857-1932).
ALFRED RUSSEL WALLACE
WILLIAM CLARK (1770-1838).
3rd BARON RAYLEIGH
CHARLES A. LINDBERGH
JOHN WAYNE (1907-1979).
ARNAULD & NICOLE: LOGIC.
Benjamin Franklin
DAVY CROCKETT (1786-1836).
CHARLES E. BROWN-SEQUARD
CHARLES BABBAGE (1792-1871).
DAVID BREWSTER (1781-1868).
NATHANIEL BOWDITCH.
NIELS HENRIK ABEL
COUNT AMEDEO AVOGADRO
ALEXANDER AGASSIZ
GEORGE BANCROFT (1800-1891).
AIM BONPLAND (1773-1858).
ADAM CLARKE (c1760-1832).
SIR FRANCIS GALTON
JOHN C. FREMONT (1813-1890).
ANDREW DOWNING (1815-1852).
JOHN FREDERIC DANIELL
JAMES EDWARD KEELER
CHEVALIER DE LAMARCK
SIR WILLIAM EDMOND LOGAN
WASHINGTON IRVING
JOSEPH LOUIS GAY-LUSSAC
MATTHIEU ORFILA (1787-1853).
SIR WALTER SCOTT
NATHANIEL W. TAYLOR
LEOPOLD von RANKE
WILLIAM J. M. RANKINE
EILHARDT MITSCHERLICH
RODERICK MURCHISON
JOHN STRONG NEWBERRY
JOHN WHITE WEBSTER
Washington Irving
VOLTAIRE (1694-1778).
Arthur Waters, British zoologist
Hermann Minkowski, German mathematician
Arthur Dendy, British zoologist
Stuart Ridley, British zoologist
Frank Beddard, British zoologist
Alfred Alcock, British naturalist
THOMAS ROBERT MALTHUS
JOHN RUSKIN (1819-1900).
HENRI FREDERIC AMIEL (1821-1881).
BENEDETTO CROCE (1866-1952).
ARTHUR JAMES BALFOUR
ALFRED NORTH WHITEHEAD
JOSIAH ROYCE (1855-1916).
CHARLES CHAPLIN (1889-1977).
ERNST KRETSCHMER
HENRY LEWIS STIMSON, 1913.
JOSEPH PULITZER (1847-1911).
MAXIM GORKI (1868-1936).
JEAN PAUL GETTY (1892-1976).
HELEN ADAMS KELLER
WILLIAM SOMERSET MAUGHAM
MARCEL PROUST (1871-1922).
HOWARD PYLE (1853-1911).
AUGUST STRINDBERG
FRANCIS PARKMAN (1823-1893).
CHARLES LUTWIDGE DODGSON
GEORG SIMON OHM (1787-1854).
Henry Hallam
CHURCHILL C. CAMBRELENG
JOHN JACOB ASTOR
JAMES LOGAN (1674-1751).
EDGAR WATSON HOWE
JOHN RANDOLPH (1773-1833).
SIR ROBERT PEEL (1788-1850).
SAMUEL SLATER (1768-1835).
WILLIAM PINKNEY (1764-1822).
ARTHUR TAPPAN (1786-1865).
GEORGE STEPHENSON
HENRY WILSON (1812-1875).
FRANCIS ELIAS SPINNER
STEPHEN VAN RENSSELAER
PHILIP SYNG PHYSICK
JAMES TALLMADGE (1778-1853).