screw compasses

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• Compass (drafting) — This article is about the drafting instrument. For other uses, see Compass (disambiguation). A beam compass and a regular compass …   Wikipedia

• Hand compass — Parts of a hand compass A hand compass (aka hand bearing compass or sighting compass) is a term for any compact magnetic compass capable of one hand use and fitted with a sighting device to record a precise bearing or azimuth to a given target or …   Wikipedia

• Christopher Hutton — Christopher William Clayton Hutton (1893 – 1965), called Clutty and also known as Christopher Clayton Hutton,[1] was an intelligence officer who worked for MI9, a subsection of British Military Intelligence. In the Second World War, he was hired… …   Wikipedia

• Nautilus (1800 submarine) — For other ships with the same name, see Ships named Nautilus. Full sized section model at Cité de la Mer, Cherbourg, France Career …   Wikipedia

• Mersey Ferry — Coordinates: 53°24′58″N 3°01′30″W / 53.416°N 3.025°W / 53.416; 3.025 …   Wikipedia

• Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… …   Wikipedia

• root — root1 rootlike, adj. /rooht, root/, n. 1. a part of the body of a plant that develops, typically, from the radicle and grows downward into the soil, anchoring the plant and absorbing nutriment and moisture. 2. a similar organ developed from some… …   Universalium

• Beam compass — A beam compass is a compass with a beam and sliding sockets or cursors for drawing and dividing circles larger than those made by a regular pair of compasses.[1] The instrument can be as a whole, or made on the spot with individual sockets… …   Wikipedia

• Mechanical — Me*chan ic*al, a. [From {Mechanic}, a.] [1913 Webster] 1. Pertaining to, governed by, or in accordance with, mechanics, or the laws of motion; pertaining to the quantitative relations of force and matter on a macroscopic scale, as distinguished… …   The Collaborative International Dictionary of English

• Mechanical effect — Mechanical Me*chan ic*al, a. [From {Mechanic}, a.] [1913 Webster] 1. Pertaining to, governed by, or in accordance with, mechanics, or the laws of motion; pertaining to the quantitative relations of force and matter on a macroscopic scale, as… …   The Collaborative International Dictionary of English

• Mechanical engineering — Mechanical Me*chan ic*al, a. [From {Mechanic}, a.] [1913 Webster] 1. Pertaining to, governed by, or in accordance with, mechanics, or the laws of motion; pertaining to the quantitative relations of force and matter on a macroscopic scale, as… …   The Collaborative International Dictionary of English