PLANCK SOLVES A COMPLEX PROBLEM FOR HIS FORMER STUDENT. PLANCK, MAX. 1858-1947. Autograph Letter...

Max Karl Ernst Ludwig Planck (1858-1947) won the Nobel Prize in Physics in 1918. This letter , written to a Professor Dennert, is dated 1912. The postmarked envelope is included. Letter is four panel

Roentgen Wilhelm Conrad Wilhelm Röntgen, Discover of X-Rays, Recommends Graduate Student 1p autograph letter in German signed by physicist Wilhelm Conrad Röntgen (1845-1923) as "W.C. Röntgen" at ce

Puccini (Giacomo, composer, 1858-1924) Autograph Letter signed ('Giacomo') to Sybil Seligman in Bournemouth, in Italian, 1½ pp. on a folded letter form with address on the reverse, Via Giotto 1 [

Jackie Kennedy Remarkable ALS to Arthur Schlesinger, Jr. Thanking Him for his Personally Dedicated Copy of "A Thousand Days", with Bonus Free Frank! 1p autograph letter signed by former First Lady Jac

FREUD, SIGMUND. 1856-1939. Autograph Letter Signed ("Freud") to Dr. Max Levy-Suhl commenting on the growing interest in psychoanalyses 1 p. (223 x 142 mm) in German, on "Wien, IX, Bergstrasse 10" lett

CHURCHILL, WINSTON SPENCER, SIR. 1874-1965. Autograph Letter Initialed ('W'), Treasury Chambers, Whitehall, May 21, 1928, 8vo, 3pp. conjoined leaves, to Max Aitken, Lord Beaverbrook, commenting on the

Wagner, Richard (1813-1883), 9 line Autograph Letter Signed by German composer Richard Wagner, dated 1858, ink on blue paper, folded twice, written during his period of exile from his native Germany,

ADAMS, JOHN QUINCY. Autograph Letter Signed, "J.Q. Adams," to George Stillman Hillard, declining an invitation to speak for the Boston Lyceum due to health problems. ½ page, 4to; remnants of moun

Einstein on Unified Field Theory, Space, Matter, and Motion - A Superb Letter Signed in Full EINSTEIN, ALBERT.  Autograph Letter Signed, "A. Einstein", in German, on a Typed Letter Signed, "Max F

Marcel Proust ALS Mentioning French Newspaper "Le Figaro" Marcel Proust autograph letter signed, written in the summer of 1910 to Max Daireaux, whom he had met two years earlier in Cabourg, France; Ca

Tobias Lear Lauds Peace Following War of 1812 & Celebrates U.S. Army & Navy A 2pp autograph letter boldly signed by George Washington's former personal secretary Tobias Lear (1762-1816), as "T

William James "Father of American psychology" 4 ALS Framed A group of four autograph letters signed "Wm. James" from a collection of correspondence to one of his Harvard students, J.R. Roberts. Dating

CHURCHILL, WINSTON SPENCER, SIR. 1874-1965. Letter Signed ('Winston S. C.'), with autograph postscript, Chartwell Manor, Westerham, Kent, September 20, 1927, 2pp., to Max Aitken, Lord Beaverbrook, fol

Autographs Theodore Roosevelt The Conservation President Promotes a Conference for “Conservation of our Natural Resources” THEODORE ROOSEVELT (1858-1919). Twenty-Sixth President of the United Stat

Rare ALS signed “Edgar A. Poe,” one page, 7.75 x 9.75, August 24, 1846. Addressed from New York, a handwritten letter to writer Frederick William Thomas, who, from 1841 until 1850, worked

ALS signed “N. Tesla,” four pages on two adjoining sheets, 5.25 x 6.75, personal monogram letterhead, June 14, 1899. Handwritten letter to Rear Admiral Francis J. Higginson by Nikola Tesla

CROCKETT, DAVID. 1786-1836. Autograph Letter Signed ('David Crockett') to James Davison on the heels of his failed 1831 Senate bid, including much commentary on his political philosophy and his disput

Johann Kalb autograph letter signed ("Baron de Kalb"). Two pages on one leaf, 6.5" x 8.5", Anderson's Ferry, [Pennsylvania]; September

ALS as president, signed “Go: Washington,” one page, 6.75 x 8.5, April 8, 1791. Handwritten letter to his nephew George Augustine Washington, penned from Dumfries, Virginia, during his pre

MARION, FRANCIS. 1732-1795. Early Autograph Letter Signed ('Fran. Marion') from the Swamp Fox to General Benjamin Lincoln, from the field, 1 p, 4to (318 x 254 mm), ink on paper, 'Camp at Sheldon' [Sou

Thaddeus Kościuszko autograph letter signed ("Thad: Kosciusko Colo."). One page, 7.75" x 6.25", Fishkill [New York]; Dec

Richard Montgomery autograph letter signed ("R Montgomery"). One page of a bifolium, 7.25" x 9", New York; "Saturday" [circa June 1775]. Add

German mathematician (1845-1918) who created set theory, which has become a fundamental theory in mathematics. Cantor established the importance of one-to-one correspondence between the members of two

Benedict Arnold autograph letter signed ("B. Arnold"). One page of a bifolium, 6.5" x 8.25", Philadelphia; June 8, 1777. Addressed b