Pendulum-Room at the Bottom of the Harton Coal-Pit, 1854. Creator: Unknown.

Pendulum-Room at the Bottom of the Harton Coal-Pit, 1854. Creator: Unknown.

2-913-907 - The Print Collector/Heritage Images

Pendulum-Room at the Bottom of the Harton Coal-Pit, 1854. Experiment to determine the weight of the Earth. 'The apparatus consists of two astronomical clocks with compensation pendulums, two invariable pendulums (Kater's) suspended...immediately in front of the clock pendulums. An astronomical clock, and an invariable pendulum were placed at each station with barometer and thermometer attached, which were regularly observed, so that the necessary corrections might be made for atmospheric resistance, variations of temperature, &c. There was also at each station a galvanic-signal-needle...connected by...insulated wires, placing the observers in electric communication. The upper and lower stations...were exactly in a vertical line, and distant nearly a quarter of a mile; and at each station the instruments were carefully enclosed to prevent the vibrations of the pendulums being affected by currents of air'. From "Illustrated London News", 1854.


Image Details


People Information

Creator
  1. Unknown, attributed to: :
People Related
  1. Sir George Biddell Airy: British: Scientist, astronomer, geophysicist

Medium
  1. Engraving

Category Hierarchy

Science & Nature Technology & Innovation

Trade & Industry Manufacturing & Heavy Industry

Science & Nature Astronomy

Science & Nature Discovery & Exploration


Digital Image Size

Pixel Dimensions (W x H) : 2442x2041
File Size : 4,868kb


Aliases

  1. ILN_1854_Page_434_b.jpg
  1. 0580079646
  1. 2-913-907
  1. 2913907

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