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Pioneers of Instrumentation-December

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This page features Pioneers of Instrumentation born in December. The pictures are thumbnails, so clicking on them will make them larger. 

Other important events in December:

Yamatake (Azbil) founded December 1, 1906



357px-Gaylussac.jpg (34669 bytes)Joseph Louis Gay-Lussac (1778 – 1850) is known for being the first to formulate what has come to be known as Charles’ Law.  According to this law, a gas expands linearly with a fixed pressure and rising temperature. While Gay-Lussac was the first to publish this law, in 1802, he referenced unpublished work by Jacques Charles from about 1787. For this reason, the principle has become known as Charles’ Law. Gay-Lussac also discovered, with Alexander von Humboldt, that the composition of the atmosphere does not change with decreasing pressure.

Birthday: December 6, 1778



240px-Ernst_Werner_von_Siemens.jpg (13784 bytes)Ernst Werner von Siemens (known as Werner von Siemens) (1816 – 1892) was a German inventor and industrialist. Siemens' name has been adopted as the SI unit of electrical conductance, the siemens. He was also the founder of the electrical and telecommunications company Siemens.

Birthday: December 13, 1816


James_Joule.jpg (17092 bytes)James Prescott Joule (1818 – 1889) was a student of John Dalton. He helped develop the absolute scale of measurement by working with Lord Kelvin. He also formulated what is now known as Joule’s law, which governs the relationship between current flowing through a substance, resistance, and heat dissipated. The joule, the SI unit of work, is named after him.

Birthday: December 24, 1818





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