alb5172485
The Time Ball, Royal Observatory, Greenwich, Fig. 7,1844. Creator: Unknown.
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Title:
The Time Ball, Royal Observatory, Greenwich, Fig. 7,1844. Creator: Unknown.
Caption:
The Time Ball, Royal Observatory, Greenwich, Fig. 7, 1844. 'The hour of one o'clock is announced by the descent of a large black ball, from the summit of a pole, which surmounts the northwestern turret of the Observatory; a position singularly favourable for its exhibition to mariners on their progress down the adjacent river Thames. The apparatus...may be said to consist of a hoist for raising the ball, a trigger and discharging gear for its liberation, and a clock, regulated by observation, for giving the required moment of time'. From "Illustrated London News", 1844, Vol V.
Technique/material:
engraving
Credit:
Album / The Print Collector/Heritage Images
Releases:
Model: No - Property: No
Rights questions?
Rights questions?
Image size:
4409 x 4960 px | 62.6 MB
Print size:
37.3 x 42.0 cm | 14.7 x 16.5 in (300 dpi)
Keywords:
19TH CENTURY • ASTRONOMY: OBSERVATORY • BLACK & WHITE • BLACK AND WHITE • BRITAIN • BRITISH • CENTURY • CLOCK • CLOCKWORK • COG • COGS • CONCEPT • CRANK HANDLE • DENTITION • DENTURE • ENGRAVING • GEAR • GEARS • GREENWICH OBS. • GREENWICH OBSERVATORY • ILLUSTRATED LONDON NEWS • ILN • MECHANISM • MOVEMENT (CLOCK) • NEWSPAPER • NEWSPAPERS • OBSERVATORY GREENWICH • OBSERVATORY • ORRERY • PLANETARIUM • PLANETARY • PRESS • PRONG • ROYAL OBSERVATORY • SET OF TEETH • TECHNOLOGY • TEETH • TIME BALL • TIME • TIME-MEASURING • TIMEKEEPING • TIMEPIECE • TOOTH • VICTORIAN ERA • VICTORIAN
