- Boys , Sir Charles Vernon
- (1855–1944) British physicistThe son of a clergyman, Boys was born in Wing in the eastern English county of Rutland and educated at the Royal School of Mines, London. He later taught at the Royal College of Science, South Kensington. Boys left the College in 1897 to take up the appointment of Metropolitan gas referee, a post that he held until 1939 when the job was abolished. The post was something of a sinecure, and required Boys to do little more than supervise the work of his assistants and to monitor methods used to test the quality of the gas the Board supplied to its customers. Boys also found time to establish himself as an expert witness, appearing in numerous patent and other technical disputes.Boys is best known for his determination of the gravitational constant in 1897. The measurement was first made by Henry Cavendish in 1797 and was expressed in terms of the Earth's density. Newton had proposed a density between five and six in 1687; Cavendish found experimentally a density of 5.448.Whereas Cavendish had used a six-foot beam in his torsion rod experiment, Boys opted for a mere nine inches. The decrease in size was made possible by using some exceedingly fine quartz fibers in the torsion balance. Boys drew these fine filaments by attaching the end of an arrow to a piece of molten quartz and firing it with a crossbow. As a result uniform temperatures were easier to maintain, and convection current disturbances were minimized. Boys calculated on the basis of his measurements that two 1 gram point masses 1 centimeter apart would attract each other with a force of 6.6576 × 10–8 dyne, and consequently the density of the Earth would be 5.527gm/cm3, figures which compare well with the modern figure of 6.670 × 10–8 dyne, and 5.517 gm/cm3.There are a number of other instruments linked to Boys. Amongst these are an integraph (1881) for mechanical integration, a radiomicrometer (1890) for measuring stellar radiation, a rotating lens camera (1900) for photographing the flight of a bullet, and, in his capacity as gas referee, an improved calorimeter to measure the calorific value of gas (1905).
Scientists. Academic. 2011.
Look at other dictionaries:
Boys, Sir Charles Vernon — ▪ British physicist and inventor born March 15, 1855, Wing, Rutland, Eng. died March 30, 1944, St. Mary Bourne, Andover, Hampshire English physicist and inventor of sensitive instruments, known particularly for his utilization of the… … Universalium
Charles Vernon Boys — Sir Charles Vernon Boys, FRS (* 15. März 1855 in Wing in Rutland, England; † 30. März 1944 in St. Mary Bourne, Andover in Hampshire) war ein englischer Physiker. Boys war der Sohn eines Pfarrers, besuchte die Schule in Marlborough und die Royal… … Deutsch Wikipedia
Charles Boys — Sir Charles Vernon Boys, FRS (* 15. März 1855 in Wing in Rutland, England; † 30. März 1944 in St. Mary Bourne, Andover in Hampshire) war ein englischer Physiker. Boys war der Sohn eines Pfarrers, besuchte die Schule in Marlborough und die Royal… … Deutsch Wikipedia
Sir Eddie Cook — Mickey Rourke Mickey Rourke Mickey Rourke en 2009 à la première de City Island. Nom de naissance Philip Andre Rourke Jr Surnom … Wikipédia en Français
C. V. Boys — Sir Charles Vernon Boys Sir Charles Vernon Boys, FRS Born 15 March 1855 Wing, Rutland … Wikipedia
C. V. Boys — Sir Charles Vernon Boys, FRS (* 15. März 1855 in Wing in Rutland, England; † 30. März 1944 in St. Mary Bourne, Andover in Hampshire) war ein englischer Physiker. Boys war der Sohn eines Pfarrers, besuchte die Schule in Marlborough und die Royal… … Deutsch Wikipedia
William Charles Osman Hill — Born 13 July 1901(1901 07 13) … Wikipedia
gravitation — gravitational, adj. gravitationally, adv. /grav i tay sheuhn/, n. 1. Physics. a. the force of attraction between any two masses. Cf. law of gravitation. b. an act or process caused by this force. 2. a sinking or falling … Universalium
integraph — /in ti graf , grahf /, n. integrator (def. 2). [1880 85; b. INTEGRATE and GRAPH] * * * ▪ instrument mathematical instrument for plotting the integral of a graphically defined function. Two such instruments were invented independently about… … Universalium
List of Imperial College London people — This is a list of famous student and staff alumni from Imperial College London and from the various historical institutions which are now part of Imperial.tudent alumniciences*Dr Abdus Salam Nobel prize winner in Physics *Dr Narinder Singh Kapany … Wikipedia