- A half tube remaining in the ceiling of a cave .
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
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Ceiling balloon — A ceiling balloon is used by meteorologists to determine the height of the base of clouds above ground level during daylight hours.The principle behind the ceiling balloon is a balloon with a known ascent rate (how fast it climbs) and determining … Wikipedia
Lava tube — ImageStackRight|300 Lava tubes are natural conduits through which lava travels beneath the surface of a lava flow, expelled by a volcano during an eruption. They can be actively draining lava from a source, or can be extinct, meaning the lava… … Wikipedia
Light tube — This article is about light tubes used for the illumination of buildings. For other uses of the phrase light tubes , see Light tube (disambiguation). Light tubes Light tubes or light pipes are used for transporting or distributing natural or… … Wikipedia
Knob and tube wiring — (sometimes abbreviated K T) was an early standardized method of electrical wiring in buildings, in common use in North America from about 1880 to the 1930s. [Terrell Croft and Wilford Summers (ed), American Electricans Handbook, Eleventh Edition … Wikipedia
Gants Hill tube station — London stations| name = Gants Hill | manager = London Underground | zone = 4 | locale = Gants Hill | borough = Redbridge | start=1947 | platforms= 2 |tubeexits05 = 3.799 | tubeexits07=4.527Gants Hill tube station is a London Underground station… … Wikipedia
half tube — 1. An inverted channel with semi circular cross section seen in cave passage ceilings, most clearly where the ceiling is an uneroded bedding surface. The half tube originates as part of a phreatic tube guided by the bedding plane, and the… … Lexicon of Cave and Karst Terminology
half-tube — 1. An inverted channel with semi circular cross section seen in cave passage ceilings, most clearly where the ceiling is an uneroded bedding surface. The half tube originates as part of a phreatic tube guided by the bedding plane, and the… … Lexicon of Cave and Karst Terminology
Bermondsey tube station — is a London Underground station. It is situated in the eastern part of Bermondsey in the London Borough of Southwark, and so also serves the western part of Rotherhithe..The station itself was designed by Ian Ritchie Architects and was originally … Wikipedia
Hanger Lane tube station — Hanger Lane is a London Underground station in north west London.HistoryA station just east of this location was originally constructed as a halt on the Great Western and Great Central Joint Railway extension line from Paddington to High Wycombe … Wikipedia
stream tube — 1. A cave passage completely filled, now or in the past, with fastmoving water and whose ceiling and walls normally show scallops . 2. The imaginary space formed between two adjacent streamlines in which flow is constant (assuming… … Lexicon of Cave and Karst Terminology