Hydrometer Collection

Hydrometers and Hygrometers C017 / 3433
Plate from 18th century encyclopedia showing illustrations of hydrometers and hygrometers. A hydrometer is an instrument used to measure the specific gravity (or relative density)

The measuring of the specific gravity of alcohol with a hydrometer
5311838 The measuring of the specific gravity of alcohol with a hydrometer; (add.info.: Engraving depicting the measuring of the specific gravity of alcohol with a hydrometer)

The moment of measuring the water level at the Inorogda hydrometric station, 1909. Creator: Vladimir Ivanovich Fedorov
The moment of measuring the water level at the Inorogda hydrometric station, 1909. Amur Oblast Museum of Regional History and Folklife

Sketches at the Conversazione of the Royal Society, 8 May (engraving)
1626528 Sketches at the Conversazione of the Royal Society, 8 May (engraving) by English School, (19th century); Private Collection; (add.info.: Sketches at the Conversazione of the Royal Society)

Description of the Scale of accompanying Dycass Hydrometer, 1790 (litho)
696101 Description of the Scale of accompanying Dycass Hydrometer, 1790 (litho) by American School, (18th century); 41x33.5 cm; Gilder Lehrman Collection, New York

A young apprentice at Globe & Simpson auto electricians workshop, Lincoln, Lincolnshire, 1961. An apprentice using a hydrometer to check the sulphuric acid concentration in a Lucas car battery

Jacques Charles, French balloonist
Jacques Alexandre Cesar Charles (1746-1823), French chemist, physicist and aeronaut, historical artwork. A scientist and professor of physics

Liquids (methylated spirits, corn oil, water, mercury) of different densities in a beaker with a hydrometer

A hydrometer

Hydrometer, artwork
Hydrometer. Computer artwork of a hydrometer floating in a liquid. A hydrometer is an instrument that uses buoyancy to measure the density of a liquid

Hydrometer floating in a liquid. A hydrometer is an instrument that uses buoyancy to measure the density of a liquid. It consists of a weighted tube that floats vertically in the liquid

All Professionally Made to Order for Quick Shipping

A hydrometer is a fascinating instrument used to measure the density or specific gravity of liquids and has been an essential tool in various fields throughout history, from scientific research to industrial applications. In the 18th century, sketches at the Conversazione of the Royal Society showcased early versions of hydrometers and hygrometers. These engravings depicted the intricate designs and mechanisms that were developed during that time. One notable example is the Dycass Hydrometer from 1790, which had a litho description of its scale. This innovation allowed for more accurate readings and improved precision in measuring liquid densities. Fast forward to 1961, where we find a young apprentice at Globe & Simpson auto electricians workshop in Lincolnshire using a hydrometer as part of his daily tasks. This highlights how this instrument was not only limited to scientific circles but also found practical use in various industries like automotive repair. Both chemists and brewers have relied on hydrometers for centuries. Engravings depict these professionals utilizing this tool to determine crucial information about their respective substances - whether it be chemical compositions or alcohol content. Interestingly, even renowned French balloonist Jacques Charles recognized the importance of hydrometry in his experiments with different gases inside balloons. The ability to accurately measure liquid densities played a vital role in understanding buoyancy principles and ensuring safe ascents into the sky. To demonstrate its functionality further, one image shows different liquids such as methylated spirits, corn oil, water, and mercury being placed together in a beaker alongside a hydrometer. By observing how each liquid affects its reading on the scale, scientists can discern their varying densities easily. The artwork depicting just a single hydrometer showcases its elegant design – often featuring long glass tubes with weighted bulbs at one end – making it visually appealing while serving its purpose effectively.