File:Grubb reflector sight - third version.png
Original file (1,926 × 1,054 pixels, file size: 1.41 MB, MIME type: image/png)
Captions
Summary
[edit]DescriptionGrubb reflector sight - third version.png |
English: Reflector sight designed by Sir Howard Grubb in cooperation with J. Emerson Reynolds and G. Rudolf Grubb, third and final version. |
Date |
circa 1901 date QS:P,+1901-00-00T00:00:00Z/9,P1480,Q5727902 |
Source | Howard Grubb: A New Collimating-telescope Gun-Sight For Large And Small Ordnance. In The Scientific transactions of the Royal Dublin Society. Vol. VII, August 1901. S. 321–330 (Online). |
Author | Unknown authorUnknown author |
Other versions |
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Licensing
[edit]Public domainPublic domainfalsefalse |
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 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. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information). | |
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Annotations InfoField | This image is annotated: View the annotations at Commons |
This portion silvered on inside surface
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:17, 11 July 2018 | 1,926 × 1,054 (1.41 MB) | Torana (talk | contribs) |
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Unique ID of original document | xmp.did:a35ba141-7c2f-4b3d-9f17-4e35d722e5c2 |
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Software used | GIMP 2.9/2.10 |
Horizontal resolution | 118.11 dpc |
Vertical resolution | 118.11 dpc |
File change date and time | 21:54, 11 July 2018 |