View of the mechanism of the Boston Time-Ball, Massachusetts, Boston Time-Ball, page, photomechanical print, number: 'Plate No. 3.', Boston (Massachusetts), cliché maker: Heliotype Printing Company, c. 1876 - in or before 1881, photographer, North America, paper, collotype, photogravure, height 145 mm x width 234 mm, Print on sixth unnumbered page after page 31., mechanics, (instruments for) measurement of time, A sepia-toned photograph of an antique electrical apparatus mounted on a wooden base, showing cylindrical and rounded metal components, threaded knobs, binding posts, and exposed coiled springs, with several thin wires connecting terminals and looping across the base; the device includes a prominent central cylinder, adjustable screw mechanisms with knurled wheels, upright rounded supports at one end, and clusters of small metal fittings and insulated wire wrappings visible along the connections.
Légende

View of the mechanism of the Boston Time-Ball, Massachusetts, Boston Time-Ball, page, photomechanical print, number: 'Plate No. 3.', Boston (Massachusetts), cliché maker: Heliotype Printing Company, c. 1876 - in or before 1881, photographer, North America, paper, collotype, photogravure, height 145 mm x width 234 mm, Print on sixth unnumbered page after page 31., mechanics, (instruments for) measurement of time, A sepia-toned photograph of an antique electrical apparatus mounted on a wooden base, showing cylindrical and rounded metal components, threaded knobs, binding posts, and exposed coiled springs, with several thin wires connecting terminals and looping across the base; the device includes a prominent central cylinder, adjustable screw mechanisms with knurled wheels, upright rounded supports at one end, and clusters of small metal fittings and insulated wire wrappings visible along the connections.

Crédit

Photo12/Liszt Collection

Notre référence

LZT26B09_397

Licence

Droits gérés

Format disponible

58.3Mo (5.9Mo) / 49.0cm x 29.8cm / 5791 x 3516 (300dpi)

Mots clés

View mechanism Boston Time-Ball Massachusetts page photomechanical print number Plate No 3 Boston cliché maker Heliotype Printing Company c 1876 - 1881 photographer North America paper collotype photogravure height 145 mm x width 234 mm Print sixth unnumbered page 31 mechanics instruments measurement time sepia-toned photograph antique electrical apparatus mounted wooden base showing cylindrical rounded metal components threaded knobs binding posts exposed coiled springs several thin wires connecting terminals looping across base device includes prominent central cylinder adjustable screw mechanisms knurled wheels upright rounded supports clusters small metal fittings insulated wire wrappings visible connections

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