Hygrometer 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)

Barral & Bixios meteorological flight
On July 27, 1850, two French agronomists, Jacques Alexandre Bixio and Jean Augustin Barral, made an ascent by a hydrogen-filled balloon from the garden of the Paris Observatory

An engraving depicting details of Robert Hooke's hygrometer, an instrument used for measuring the amount of
5311628 An engraving depicting details of Robert Hooke's hygrometer, an instrument used for measuring the amount of humidity water vapour in the atmosphere, soil, or in confined spaces. 1

An engraving depicting a hygrometer. Monk's hood of thin cardboard attached to a piece of catgut at a; when air
5310945 An engraving depicting a hygrometer. Monk's hood of thin cardboard attached to a piece of catgut at a; when air dry, catgut twisted and raised hood fell

Michael Faraday (1791-1867)
864450 Michael Faraday (1791-1867); (add.info.: Michael Faraday (1791-1867) English chemist and physicist, left, and John Frederic Daniell (1790-1845) English chemist, physicist and meteorologist

Instruments used by Mr. Glaisher during his balloon ascent, 1862. Creator: Unknown
Instruments used by Mr. Glaisher during his balloon ascent, 1862. 1. Barometer; 2; Wet and Dry Bulb Hygrometer; 3. Daniell's Hygrometer; 4. Chronometer; 5. Bucket of Water to keep Bulb wet; A. B

Wheel barometer, J. Ortelli & Co. first half of the 19th century (mahogany
711010 Wheel barometer, J. Ortelli & Co. first half of the 19th century (mahogany, glass & metal) by English School, (19th century); length: 98 cm; Private Collection; (add.info)

Meteorological instruments
Instruments of meteorology. Daniel Rutherfords minimum thermometer 1, three-scale thermometer with hygrometer 2, pronosticon 3 and hair-tension hygrometer 4

Types of hygrometers, 18th century, to measure moisture content by Anderson 8, Dr. Robert Hooke 9, 10, Dr. Hale 11, James Ferguson 12, 13

Types of hygrometers, 18th century, to measure moisture content. Jean-Andre De Lucs whalebone hygrometer, and others by Horace-Benedict de Saussure, Benjamin Meggot Forster

Illustrations from English microscopist Robert Hookes Micrographia, 1665. 1: underside of a stinging nettle leaf; 2: beard of wild oat used in Hookes hygrometer; 3: section of head of wild oat; 4

Ferdinand Di Medici
FERDINAND (or FERRANTE) II di MEDICI, Grand duke of Tuscany, ruler of Florence and Etruria. Notable scientist who invented a thermometer and the condensation hygrometer. Date: 1610 - 1670

Michael Faraday (1791-1867) English chemist and physicist, left, and John Frederic Daniell (1790-1845) English chemist, physicist and meteorologist

1: Underside of stinging nettle leaf 2: Beard of wild oat used in Hookes hygrometer. 3: Section of head of wild oat. 4: Hookes hygrometer. From Robert Hooke Micrographia London 1665. Engraving

John Frederic Daniell (1790-1845) English chemist, physicist and meteorologist. Among his inventions were the Daniell cell, a wet storage battery, and a hygrometer

19th Century hygrometer. 1880 hygrometer in a stand. A hygrometer is a meteorological instrument used for measuring the moisture content in the environment

SCIENTIFIC INSTRUMENTS. Examples of Florentine thermometers and a hygrometer. Illustration from the Saggi di naturali Esperienze (Essays on Natural Experiments) by Lorenzo Magalotti, 1660

Vegetable hygrometer, 19th century
Vegetable hygrometer, 19th-century artwork. Hygrometers are used to measure relative humidity, which can be used to predict the approach of rain

17th Century scientific equipment. Historical artwork showing a collection of thermometers and a hygrometer (far right) from 17th Century Florence, Italy

Weighbridge and hygrometer, 18th century
Page of illustrations from an 18th century magazine. The item labelled II is a design of a weighbridge. The side view (right) has been rotated to appear upright

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The hygrometer, a fascinating instrument used to measure humidity levels in the atmosphere, has a rich history dating back centuries. In the 18th century, various types of hygrometers were developed to accurately gauge moisture content. One such example is the Hydrometers and Hygrometers C017 / 3433. During this time period, meteorological flights like Barral & Bixios took place, where these instruments played a crucial role in gathering data about weather conditions. Alongside hygrometers, wheel barometers such as J. Ortelli & Co. 's mahogany masterpiece from the first half of the 19th century were also employed for meteorological observations. Illustrations from Robert Hooke's Micrographia published in 1665 showcased early hygrometers. These illustrations depicted innovative methods using natural materials like stinging nettle leaf undersides and wild oat beards to measure humidity levels. Prominent figures in science also contributed to advancements in hygrometer technology. Ferdinand Di Medici, an esteemed chemist known for his engraving work on scientific instruments, made significant contributions to improving their accuracy. Michael Faraday and John Frederic Daniell were two influential English scientists who furthered our understanding of atmospheric conditions through their research on hygrometry. Faraday was renowned for his groundbreaking discoveries in chemistry and physics while Daniell excelled as both a chemist and physicist with expertise in meteorology. With its ability to provide valuable insights into environmental conditions, the humble hygrometer continues to play an essential role today. From ancient times until now, this remarkable instrument has evolved alongside human curiosity about our surroundings.