EDUARD VON HARTMANN
IMMANUEL KANT (1724-1804).
GEORGE WILHELM HEGE
JOHN STUART MILL
LEO TOLSTOY (1828-1910).
HENRI BERGSON (1859-1941).
MARTIN BUBER (1878-1965).
MARTIN HEIDEGGER
KARL JASPERS (1883-1969).
MAIMONIDES (1135-1204).
Signature of Baruch Spinoza.
GOTTFRIED von LEIBNIZ
GOTTHILF VON SCHUBERT
FRIEDRICH W.J. von SCHELLING
SOREN KIERKEGAARD
ARTHUR SCHOPENHAUER
KARL MARX (1818-1883).
ROBERT CHAMBERS (1802-1871).
RALPH WALDO EMERSON
JOHANN GOTTFRIED von HERDER
JEREMY BENTHAM (1748-1832).
JOHANN GOTTLIEB FICHTE
HENRY DAVID THOREA
ERNST MACH (1838-1916).
RENE DESCARTES (1596-1650).
THOMAS HOBBES (1588-1679).
BARUCH SPINOZA (1632-1677).
BERTRAND RUSSELL
VOLTAIRE SIGNATURE.
Immanuel Kant's signature.
BENJAMIN FRANKLIN (1706-1790).
Michael Faraday
FRIEDRICH W HLER (1800-1882).
ANDRE MARIE AMPERE
GEORG CANTOR (1845-1918).
WILLIAM H. BRAGG (1862-1942).
MICHEL EUGENE CHEVREUL
THOMAS GRAHAM (1805-1869).
SIGMUND FREUD (1856-1939).
KARL FRIEDRICH GAUSS
Signature of Emanuel Swedenborg.
THOMAS PAINE (1737-1809).
JOHN TYNDALL (1820-1893).
JOHN HERSCHEL (1792-1871).
JOHN WESLEY POWELL
SAMUEL GEORGE MORTON
SIR CHARLES LYELL
THOMAS YOUNG (1773-1829).
SIR HUMPHRY DAVY (1778-1829).
SIR HUMPHRY DAVY
SIR MARTIN FROBISHER
KARL WILHELM SCHEELE
WALT DISNEY (1901-1966).
CABEZA DE VACA (c1490-c1557).
HENRY CAVENDISH (1731-1810).
IVAN TURGENEV (1818-1883).
JOHN JACOB ASTOR (1763-1848).
LEOPOLD von RANKE
LORD KELVIN (1824-1907).
Samuel Taylor Coleridge
Robert Macnish
William Godwin
PRINCE KROPOTKIN (1842-1921).
BARON FRIEDRICH von STEUBEN
MAX PLANCK (1858-1947).
SVANTE AUGUST ARRHENIUS
DAVY CROCKETT SIGNATURE.
Signature of Charles Darwin.
Signature of Louis Pasteur.
MOSES MENDELSSOHN
MARIE CURIE (1867-1934).
JOHN RUSKIN (1819-1900).
THOMAS ROBERT MALTHUS
JACQUES CARTIER (1491-1557).
HERMAN MELVILLE (1819-1891).
CHARLOTTE BRONT
ROBERT BROWNING (1812-1889).
ELIZABETH BARRETT BROWNING
CHARLES DICKENS (1812-1870).
FRIEDRICH ENGELS
ARNAULD & NICOLE: LOGIC.
IDA LAURA PFEIFFER
GEORG SIMON OHM (1787-1854).
JULES HENRI POINCARE
SIR WILLIAM RAMSAY
CHARLES LUTWIDGE DODGSON
J.H. HOFF (1852-1911).
BARON CHRISTIAN von WOLFF
EDUARD MOERIKE (1804-1875).
Signature of Blaise Pascal.
WILLIAM CLARK (1770-1838).
GEORGE BERNARD SHAW
JOHN WILKES BOOTH (1838-1865).
EDWARD B. TITCHENER
SIR WALTER SCOTT
NATHANIEL W. TAYLOR
WILLIAM J. M. RANKINE
EILHARDT MITSCHERLICH
RODERICK MURCHISON
MATTHIEU ORFILA (1787-1853).
JOHN STRONG NEWBERRY
JOHN WHITE WEBSTER
CHARLES BABBAGE (1792-1871).
DAVID BREWSTER (1781-1868).
DAVY CROCKETT (1786-1836).
NATHANIEL BOWDITCH.
NIELS HENRIK ABEL
CHARLES E. BROWN-SEQUARD
COUNT AMEDEO AVOGADRO
ALEXANDER AGASSIZ
GEORGE BANCROFT (1800-1891).
AIM BONPLAND (1773-1858).
JEAN BAPTISTE ANDR DUMAS/n(1800-1884).
ADAM CLARKE (c1760-1832).
SIR FRANCIS GALTON
JOHN C. FREMONT (1813-1890).
ANDREW DOWNING (1815-1852).
HENRI LEON LEBESGUE
JOHN FREDERIC DANIELL
JAMES EDWARD KEELER
CHEVALIER DE LAMARCK
SIR WILLIAM EDMOND LOGAN
WASHINGTON IRVING
JOSEPH LOUIS GAY-LUSSAC
CARL SANDBURG (1878-1967).
SAMUEL JOHNSON (1709-1784).
Signature of Adolf Erik Nordenskiold
Benjamin Franklin
VOLTAIRE (1694-1778).
FRANCIS PARKMAN (1823-1893).
ERNEST RUTHERFORD
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).
ROBERT TOOMBS (1810-1883).
CHARLES THOMSON (1729-1824)
FERNANDO WOOD (1812-1881).
DANIEL WEBSTER (1782-1852).
ELIHU B. WASHBURNE
CHURCHILL C. CAMBRELENG
JOHN JACOB ASTOR
JAMES LOGAN (1674-1751).
EDGAR WATSON HOWE
MATTHEW VASSAR (1792-1868).
JOHN RANDOLPH (1773-1833).
SIR ROBERT PEEL (1788-1850).
JOHN D. ROCKEFELLER
JAMES MILLER MCKIM
WILLIAM H. PANCOAST.
KARL MARX MEMBERSHIP.
PHILOSOPHICAL SOCIETY.
PRINCE OTTO von BISMARCK
LUDWIG JOACHIM von ARNIM
JOSEPH von EICHENDORFF
CADWALLADER COLDEN
LEONARDO DA VINCI
MAX BORN (1882-1970).
JOHANNES KEPLER
HENRY KNOX (1750-1806).
JOSEPH LISTER (1827-1912).
Washington Irving
JOHN BURROUGHS (1837-1921).
JOHN FRANKLIN (1786-1847).
ALFRED THAYER MAHAN
THOMAS MANN (1875-1955).
JONATHAN SWIFT (1667-1745).
DANIEL DEFOE (c1659-1731).
JOHN WAYNE (1907-1979).
JAMES BOSWELL (1740-1795).