Useful english dictionary. 2012.
Sprengel pump — Spreng el pump (spr[e^]ng el p[u^]mp ). (Physics) A form of air pump in which exhaustion is produced by a stream of mercury running down a narrow tube, in the manner of an aspirator; named from the inventor. [1913 Webster] … The Collaborative International Dictionary of English
Sprengel pump — The supply of mercury is contained in the reservoir on the left. It flows over into the bulb B, where it falls in drops into the long tube on the right. These drops entrap between them the air in B. The mercury which runs out is collected and… … Wikipedia
Tube de Crookes — Photo d un tube de Crookes. Les électrons circulent en ligne droite de la cathode, sur la gauche, mise en évidence par l ombre portée de la croix sur la paroi fluorescente, à droite. L anode est en bas. Un tube de Crookes est un des premiers… … Wikipédia en Français
sprengel pump — noun Usage: usually capitalized S Etymology: after Herman J. P. Sprengel : an air pump in which exhaustion is produced by drops of mercury running down a narrow tube and trapping bubbles of gas between them … Useful english dictionary
Crookes tube — A Crookes tube. The electrons travel in straight lines from the cathode on the left, shown by the shadow cast by the cross on the fluorescence on the righthand wall. The anode is at the bottom. A Crookes tube is an early experimental electrical… … Wikipedia
explosive — explosively, adv. explosiveness, n. /ik sploh siv/, adj. 1. tending or serving to explode: an explosive temper; Nitroglycerin is an explosive substance. 2. pertaining to or of the nature of an explosion: explosive violence. 3. likely to lead to… … Universalium
Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… … Wikipedia
Fluorescent lamp — A fluorescent lamp or fluorescent tube is a gas discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light.Unlike… … Wikipedia
Spina bifida — Classification and external resources ICD 10 Q05, Q76.0 … Wikipedia
Timeline of zoology — A preliminary timeline of the history of zoology before the 1859 publication of Darwin s Origin of Species . Ancient world *28000 BC. Cave painting (e.g. Chauvet cave [http://www.culture.gouv.fr/culture/arcnat/lascaux/en/] ) in Europe, especially … Wikipedia
