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1923 In Science
The year 1923 in science and technology involved some significant events, listed below. Aeronautics * January 17 (or 9) – First stable flight of the first rotorcraft, Juan de la Cierva's Cierva C.4 autogyro, in Spain. Astronomy and space science * June – Hermann Oberth publishes ''Die Rakete zu den Planetenräumen'' ("By Rocket into Planetary Space"). * October 21 – First official public showing of a planetarium projector, a Zeiss model at the Deutsches Museum in Munich. Biology * March 23 – The governor of Oklahoma signs House Bill 197 with the Montgomery amendment outlawing the theory of evolution in public school textbooks purchased by the state, the first anti-Darwinian legislation passed in the United States. * Karl von Frisch publishes "Über die 'Sprache' der Bienen. Eine tierpsychologische Untersuchung" ("On the 'language' of bees: an examination of animal psychology"). Chemistry * Dirk Coster and George de Hevesy publish their discovery of the transition met ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirk Coster
Dirk Coster (5 October 1889 – 12 February 1950) was a Dutch physicist. He was a professor of physics and meteorology at the University of Groningen. Coster is known as the co-discoverer of hafnium (element 72) in 1923, along with George de Hevesy, by means of X-ray spectroscopic analysis of zirconium ore. Its name is derived from ''Hafnia'', the Latin name for Copenhagen, as the discovery took place in that city. He helped Lise Meitner escape from Nazi Germany. Childhood and education Coster was born in Amsterdam. Coster grew up in a large working-class family; he was the third child of Barend Coster, a blacksmith, and Aafje van der Mik. The Coster family valued education. Ten of their children survived to adulthood and all received enough education to go onto middle-class professions. From 1904 to 1908 Dirk went to the Teacher's College in Haarlem, then was a teacher until 1913. With the aid of private support he was able to study mathematics and physics at the Universi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeitschrift Für Physik A
A magazine is a periodical literature, periodical publication, print or digital, produced on a regular schedule, that contains any of a variety of subject-oriented textual and visual content (media), content forms. Magazines are generally financed by advertising, newsagent's shop, purchase price, prepaid subscription business model, subscriptions, or by a combination of the three. They are categorised by their frequency of publication (i.e., as weeklies, monthlies, quarterlies, etc.), their target audiences (e.g., women's and trade magazines), their subjects of focus (e.g., popular science and religious), and their tones or approach (e.g., works of satire or humor). Appearance on the cover of print magazines has historically been understood to convey a place of honor or distinction to an individual or event. Term origin and definition Origin The etymology of the word "magazine" suggests derivation from the Arabic language, Arabic (), the broken plural of () meaning "depot, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
