| 11. | The Fahrenheit hydrometer is a constant-volume device that will float in water.
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| 12. | However, the hydrometer was invented before Hypatia, and already known in her time.
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| 13. | In Synesius'fifteenth letter, he requests Hypatia to make a hydrometer for him.
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| 14. | This is because the change in air pressure is applied to the entire hydrometer flask.
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| 15. | The hydrometer transformed how beer was brewed.
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| 16. | Similarly, the hydrometer was invented before Hypatia, and already known in her time.
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| 17. | The hydrometer is then floated in a liquid of unknown density ( shown in green ).
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| 18. | Certain ships of the United States Navy adopted the use of the hydrometer in the 1850s.
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| 19. | Soil gradation is determined by analyzing the results of a sieve analysis or a hydrometer analysis.
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| 20. | One danger of these built-in hydrometers : They check only one of the six cells.
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