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Model of an Optical Telegraph for Ships, Model of an optical telegraph. Schematic model of an optical telegraph, on a pedestal. The pole, although rectangular in cross-section, represents a mast and rod to which the moving parts are attached. These consist of two folding arms at the bottom and an oval plate at the top, which can be folded up and down rotating around a hinge, all parts are moved with ropes that run down disks in the mast., Engelbert Lucas, Netherlands, 1835, wood (plant material), brass (alloy), rope, h 48.6 cm × w 15.3 cm × d 10.1 cm
Crédito: Album / quintlox
Tamaño imagen: 4508 × 6460 px | 83.3 MB
Tamaño impresión: 38.2 × 54.7 cm | 1774.8 × 2543.3 in (300 dpi)