|
John Cuthbertson (instrument Maker)
John Cuthbertson (bapt. 1 July 1743 in Dearham – 1821) was an English instrument maker and inventor that lived from 1768 until roughly 1796 in Amsterdam. Biography John was the second son of the inn keeper and yeoman Jonathan Cuthbertson and his second wife Mary Fisher. John had three siblings, of which two survived (a younger brother Jonathan (1744–1806) and one other): the third died at young age (Jonathan, the eldest). John and the younger brother Jonathan are often confused in literature and publications. While John worked for a long time in Amsterdam, Jonathan worked n Rotterdam, both in the same line of work. John studied with the prominent London instrument maker James Champneys and when Champney moved to Amsterdamaccording to some sources after a bankruptcy: other sources deny this (Bryden 1977) in December 1768 Cuthbertson joined him. On 1 September 1768 John had married Champney's daughter Jane. They had four children, three sons and a daughter, but only the daught ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrostatic Generator Teylers Museum
Electrostatics is a branch of physics that studies electric charges at rest (static electricity). Since classical times, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word for amber, (), was thus the source of the word 'electricity'. Electrostatic phenomena arise from the forces that electric charges exert on each other. Such forces are described by Coulomb's law. Even though electrostatically induced forces seem to be rather weak, some electrostatic forces are relatively large. The force between an electron and a proton, which together make up a hydrogen atom, is about 36 orders of magnitude stronger than the gravitational force acting between them. There are many examples of electrostatic phenomena, from those as simple as the attraction of plastic wrap to one's hand after it is removed from a package, to the apparently spontaneous explosion of grain silos, the damage of electronic components during manufacturin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
