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Refracting stereoscope, 1852Diagram of a refracting stereoscope, 1852. Date: 1852
SCHEINER, Christoph (1575-1650). Physicist and astronomer in Ingolstadt. Projecting the image of the Sun through a refracting telescope on to a screen in order to study sunpots. Engraving
Griffith Observatory, Los Angeles, California, USA. It includes a planetarium, a hall of science and a refracting telescope