Image:Hadley's octant.png

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[edit] Summary

Description

Drawing of John Hadley's octant.
Source

Hadley, “Hadley’s Octant.” Philosophical Transactions of the Royal Society, vol. 37, p. 147, 1731.
Date

1731
Author

John Hadley
Permission
(Reusing this image)

see below

I added the English text identifying components along with curved arrows. Original alphabetic tags will be too small to be seen in a thumbnail.

[edit] Licensing

Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.

Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement that rule of the shorter term.

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File history

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Date/TimeDimensionsUserComment
current21:04, 25 September 20071,031×806 (55 KB)Michael Daly ({{Information |Description=Drawing of John Hadley's octant. |Source=Hadley, “Hadley’s Octant.” Philosophical Transactions of the Royal Society, vol. 37, p. 147, 1731. |Date=1731 |Author=John Hadley |Permission= |other_versions= }} I added the Engli)
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