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It was invented by Daniel Gabriel Fahrenheit (1686–1736), better known for his work in thermometry. The Nicholson hydrometer, after William Nicholson (1753-1815), is similar in design, but instead of a weighted bulb at the bottom there is a small container ("basket") into which a sample can be placed. Nicholson's Hydrometer
The book readable is by adults as well as children, who will possibly better appreciate the value and practicality of the gingersnap hygrometer. The hyphen in the name Gub-Gub is replaced by a space on the dust jacket, on the title page, and on the dedication page, but the hyphen appears in the name elsewhere.
A hygrometer is an instrument which measures the humidity of air or some other gas: that is, how much of it is water vapor. [1] Humidity measurement instruments usually rely on measurements of some other quantities, such as temperature, pressure, mass, and mechanical or electrical changes in a substance as moisture is absorbed.
Jean-André Deluc was born in Geneva.His family had come to the Republic of Geneva from Lucca, Italy, in the 15th century. [2] His mother was Françoise Huaut. His father, Jacques-François Deluc, [3] had written in refutation of Bernard Mandeville and other rationalistic writers, but he was also a decided supporter of Jean-Jacques Rousseau.
2007 Toyota Yaris hatchback owner's manual 1919 Ford Motor Company car and truck operating manual. An owner's manual (also called an instruction manual or a user guide) is an instructional book or booklet that is supplied with almost all technologically advanced consumer products such as vehicles, home appliances and computer peripherals.
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Perhaps "An hygrometer is one of several instruments that can be used to measure the density or specific gravity of liquids..." would be an appropriate way of introducing the fact that the hydrometer has modern - and much more accurate and versatile - incarnations.
Ángela Ruiz Robles (March 28, 1895 in Villamanín, León – October 27, 1975 in Ferrol, A Coruña) was a Spanish teacher, writer, pioneer and inventor of the mechanical precursor to the electronic book, invented 20 years prior to Michael Hart’s Project Gutenberg, commonly referred to as the true inventor of the e-book, and over half a century before present-day e-books.