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Chester Floyd Carlson (February 8, 1906 – September 19, 1968) was an American physicist, inventor, and patent attorney born in Seattle, Washington.. Carlson invented electrophotography (now xerography, meaning "dry writing"), producing a dry copy in contrast to the wet copies then produced by the Photostat process; it is now used by millions of photocopiers worldwide.
The Regular Issues of 1922–1931 were a series of 27 U.S. postage stamps issued for general everyday use by the U.S. Post Office. Unlike the definitives previously in use, which presented only a Washington or Franklin image, each of these definitive stamps depicted a different president or other subject, with Washington and Franklin each confined to a single denomination.
During the first seven weeks of the Civil War, the U.S. Post Office still delivered mail from the seceded states. Mail that was postmarked after the date of a state's admission into the Confederacy through May 31, 1861, and bearing U.S. (Union) postage is deemed to represent 'Confederate State Usage of U.S. Stamps'. i.e., Confederate covers franked with Union stamps. [4]
Mail carriers in Baku, 1914. The postage stamps and postal history of Azerbaijan describes the history of postage stamps and postal systems in Azerbaijan, which closely follows the political history of Azerbaijan, from its incorporation to the Russian Empire in 1806, to its briefly obtained independence in 1918, which it lost to the Soviet Union in 1920 and re-acquired in 1991 after the fall ...
Philately (/ f ɪ ˈ l æ t əl i /; fih-LAT-ə-lee) is the study of postage stamps and postal history. It also refers to the collection and appreciation of stamps and other philatelic products. [1] While closely associated with stamp collecting and the study of postage, it is possible to be a philatelist without owning any stamps. [2]
Learned Muslim captives played a very important role in the spread of Arabic science and philosophy over the Christian world. [21] The liberation of Muslim slaves was a state affair and elevated the popular esteem of the sovereign government. Muslim slaves were either freed or exchanged through special legislation and international treaties. [22]
Siddiqui Stamps Catalogue - Collect Pakistan Postage Stamps 2011 Edition available at www.pakistanphilately.com Editor: Akhtar ul Islam Siddiqui; Ron Doubleday and Usman Ali Isani, Pakistan Overprints on Indian Stamps and Postal Stationery 1947–1949, Karachi (1993).
Badge of the Lotta Svärd. Lotta Svärd (Finland Swedish: [ˈlotːɑ ˈsvæːrd]) was a Finnish voluntary auxiliary paramilitary organisation for women. Formed originally in 1918, it had a large membership undertaking volunteer social work in the 1920s and 1930s.