Original file (1,808 × 1,772 pixels, file size: 2.49 MB, MIME type: image/jpeg)
DescriptionDial of Ronalds' electric telegraph.jpg | English: Revolving alphanumeric dial created by Francis Ronalds as part of his electric telegraph (1816) |
Date | |
Source | Descriptions of an Electrical Telegraph and of some other Electrical Apparatus (1823). |
Author | Ronalds F. |
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. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. | |
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
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:11, 24 November 2018 | 1,808 × 1,772 (2.49 MB) | Dicklyon | brightened and sharpened | |
03:51, 6 October 2016 | 1,808 × 1,772 (1.61 MB) | Sperth | User created page with UploadWizard |
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Width | 1,808 px |
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Height | 1,772 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CC 2019 (Macintosh) |
File change date and time | 17:06, 23 November 2018 |
Exif version | 2.21 |
Color space | sRGB |
Unique ID of original document | A25CE0E685ACE8703F30147F02683EAD |
Date and time of digitizing | 08:59, 23 November 2018 |
Date metadata was last modified | 09:06, 23 November 2018 |