Image: Gravity cell
Size of this preview: 474 × 600 pixels. Other resolutions: 189 × 240 pixels | 553 × 700 pixels.
Original image (553 × 700 pixels, file size: 67 KB, MIME type: image/gif)
Description: Engraving of a gravity cell from the Cyclopedia of Telegraphy and Telephony, published in 1919.
Title: Gravity cell
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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