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"Magic Lantern photo slide with image of German Parseval balloon.\nSlide #18 of 24 from Series XXVIII, produced in Germany by Unger &amp;amp; Hoffmann A.G. from Dresden,  Nord-Amerika 2. Teil : von New Orleans bis San Francisco (lecture: Projektion für Alle  (1906-1914)\nSerie XXVIII. No.18 Parseval Balloon\nParseval balloon flying over city. \nLabels on slide in English, French and German.:\nThe germany ballon of Parseval   Der deutsche Parseval Ballon.  Le allemand ballon de Parseval,\n3¼ inches (8.3cm) square\n \nThe Parsevals were 22 airships built between 1909 and 1919 by the Luft-Fahrzeug-Gesellschaft (LFG) following the design of August von Parseval. \nIn contrast to the Zeppelins, the Parsevals were non-rigid or semi-rigid airships, with little or no stiffening structure inside the fabric envelope. The Zeppelins had a rigid internal framework made of duralumin. Both types relied on hydrogen gas to provide lift.\n \nWIKIPEDIA\nLantern slides were the first projected images, dating back to the mid 17th century. Originally made with drawn images on glass, lantern slides became a hugely popular base for photography well into the 1900s before slowly being replaced by celluloid film slides.\nDisplayed through a magic lantern projector, lantern slides could be coloured in with paint or ink and were made by everyone from amateur photographers, to school teachers, to government agencies.\nwww.whyte.org/lantern-slides\n"
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