File:Back-observation-quadrant.png

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Description Drawing of a quadrant used for back-observations of the sun
Date
Source Own work
Author Michael Daly

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Drawing of a back observation quadrant. This instrument was used in the manner of a backstaff to measure the elevation of the sun by observing the position of a shadow on the instrument.

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inception

12 November 2007

media type

image/png

checksum

a51a06dd919b2271b3a47c8bb463f7e15c2b52a2

determination method: SHA-1

data size

20,620 byte

height

777 pixel

width

967 pixel

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Date/TimeThumbnailDimensionsUserComment
current03:46, 13 November 2007Thumbnail for version as of 03:46, 13 November 2007967 × 777 (20 KB)wikimediacommons>Michael Daly~commonswiki{{Information |Description=Drawing of a quadrant used for back-observations of the sun |Source=self-made |Date=2007-11-12 |Author= Michael Daly |Permission= |other_versions= }}

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