File:Natural Hygroscope Figure 4.jpg
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Summary
[edit]DescriptionNatural Hygroscope Figure 4.jpg |
English: "... Fig. 4, is a cork, B, in which a needle is inserted as a pointer, suspended from a nail by a catgut cord. The catgut cord contains more or less twist in proportion to the quantity of moisture in the air. The needle, therefore, as the cord turns, swings, in one or other direction; and by a little experimenting, a dial can easily be made from which its indications may be interpreted." |
Date | |
Source | Facts Worth Knowing Selected Mainly from the Scientific American for Household, Workshop, and Farm Embracing Practical and Useful Information for Every Branch of Industry. |
Author | Sloane, T. O'Conor |
Licensing
[edit]Public domainPublic domainfalsefalse |
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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. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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current | 00:24, 11 September 2017 | ![]() | 338 × 919 (123 KB) | Garfield7380 (talk | contribs) | User created page with UploadWizard |
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Date and time of data generation | 19:03, 10 September 2017 |
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File change date and time | 19:06, 10 September 2017 |
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Date and time of digitizing | 19:03, 10 September 2017 |
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Scene type | A directly photographed image |
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