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Title: Gustave Trouve's megascope.
Caption: An engraving depicting Gustave Trouve's megascope for projecting opaque pictures and objects onto a screen. Gustave Trouve (1839-1902) a French electrical engineer and inventor. Dated 19th century.
Credit: Album / Universal Images Group / Universal History Archive/UIG
Image size: 3365 × 6232 px | 60.0 MB
Print size: 28.5 × 52.8 cm | 1324.8 × 2453.5 in (300 dpi)