Image: Davis-quadrant
Size of this preview: 800 × 541 pixels. Other resolutions: 320 × 216 pixels | 1,971 × 1,333 pixels.
Original image (1,971 × 1,333 pixels, file size: 60 KB, MIME type: image/png)
Description: Drawing of a Davis Quadrant or Backstaff
Title: Davis-quadrant
Credit: Own work
Author: Michael Daly
Usage Terms: Creative Commons Attribution 3.0
License: CC BY 3.0
License Link: https://creativecommons.org/licenses/by/3.0
Attribution Required?: Yes
Image usage
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