File:Calcutta Baseline 1832.jpg
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Summary
| Description | Great Trigonometrical Survey measurement of the Calcutta baseline in 1832 by George Everest. The engraving is based on a sketch by James Prinsep. It shows a Ramsden chain being set on coffers supported by pickets. The tent is to avoid expansion due to heat. The boning telescope is used to align the links of the chain. |
| Date | |
| Source | Reprint in Historical records of the survey of India. Volume 4. 1830-1843 by R.H. Phillimore. (1954) |
| Author | Sketch by James Prinsep |
Licensing
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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. | |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 04:29, 8 March 2016 | | 1,143 × 832 (147 KB) | Shyamal | {{Information |Description=Great Trigonometrical Survey measurement of the Calcutta baseline in 1832 by George Everest. The engraving is based on a sketch by James Prinsep. It shows a Ramsden chain being set on coffers supported by pickets. The tent is... |
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