PIERRE CURIE The Nobel Peace Prize winning physicist apologizes for a missed appointment due to having been in his lab. Rare ALS: "P. Curie", 1½p, 5¾x4¼, front and verso. Faculté des Sciences de Paris, Cours de Physique, Paris, 1904 May 29. To an unnamed woman. Written from the Curie home at 108 Boulevard Kellerman. In French, translated. In full: "We sincerely regret Mme Curie and I having missed your appointment yesterday, which you granted us. I was in the laboratory yesterday at 5:30 in the evening. I found your letter but it was already too late and Mme Curie does not go to the laboratory at this time. Please excuse us and accept our sincerest best wishes." Five months earlier, Pierre and Marie Curie shared the 1903 Nobel Prize in Physics with Antoine Henri Becquerel for discovering radioactivity and studying uranium. The Curies continued their work on radioactivity, but Marie did not go to the laboratory as often as before. She was then three months pregnant and radioactive material was not something of which to be in contact.

GUGLIELMO MARCONI Beautifully framed display of a Marconi signed NAWA certification. Partly Printed DS: "G Marconi" 1p, 10¼ x 8. National Amateur Wireless Association certification to James P. Buxton. Expiration date October 1922. Marconi (1874-1937) carried out successful experiments with wireless telegraphy near Bologna, Italy in 1895. Two years later, he erected a wireless station at La Spezia at the invitation of the Italian government. In 1898, Marconi established communications across the English Channel between England and France. He was awarded the 1909 Nobel Prize in Physics in recognition of his "contribution to the development of wireless telegraphy". In 1914, Marconi was appointed a Senator in Rome. While in England in 1924, Marconi signed contracts with the British Postal service to set up radio communication with all parts of British Commonwealth. Toned, creased and stains throughout. Framed to an overall size of 19½ x 29½. Frame exhibits wearing at corners. Left knob was cracked and repaired.

ALBERT EINSTEIN This typed letter is signed by the physicist and framed in the Gallery of History style to a size of 34x20 Typed Letter Signed: "A. Einstein" in ink. 6½x8½ letter. One page. Letterhead from Knollwood, Saranac Lake, New York. Dated August 1, 1940. Sent to Dr. Alvin Johnson. In Full: "Mr. Hermann Broch has informed me that I may be asked about Professor Karl Feldmann of Leyden(Holland). My knowledge of Professor Feldmann's work, however, is not sufficient to give a valuation of it. I should be grateful if some papers by him would be sent to me. / With the expression of my highest appreciation of your admirable activities". Framed with two plaques and a 7x9 color reprinted painting by Rick Parks to a total size of 34x20. Albert Einstein (1879-1955) was born in Ulm, Germany. When he was a teenager, his family moved throughout Europe due to his father's work. At various times in his life, he held citizenship from Switzerland, the Weimar Republic, and the United States. Most of his ground-breaking work in physics came well before WWII in the form of his special theory of relativity and his studies in the general theory of relativity.

ALBERT EINSTEIN Einstein Reviews the Controversy of the Universe. Extraordinary letter with amazing content! Typed Letter Signed: "A. Einstein". 8¼ x 9½. One page, on personal letterhead. Dated April 25, 1932. Sent to Dr. Ludwig Silberstein. Minor tears at vertical and horizontal folds which do not touch typeface. Surface stains at lower-left edge. Otherwise, fine condition. Includes unsigned photograph and 3 presentation plaques, one of which included an additional translation of the letter. Framed by the Gallery of History to an overall size of 41x25. Translated from German into English, in full: Dear Mr. Silberstein! Naturally I think back to our personal acquaintance. -On the cosmological problem and the term Λ the following remarks: 1.) From the point of view of my latest results in general relativity, the introduction of the Λ term is far more natural than it originally was. This emerges from a work that is right now being printed at the Academy. 2.) In Pasadena this winter I changed my position on the cosmological problem.