single-needle instrument

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• Single-lens reflex camera — The single lens reflex (SLR) camera uses an automatic moving mirror system which permits the photographer to see exactly what will be captured by the film or digital imaging system, as opposed to non SLR cameras where the view through the… …   Wikipedia

• Meridian instrument — Meridian Me*rid i*an, n. [F. m[ e]ridien. See {Meridian}, a.] [1913 Webster] 1. Midday; noon. [1913 Webster] 2. Hence: The highest point, as of success, prosperity, or the like; culmination. [1913 Webster] I have touched the highest point of all… …   The Collaborative International Dictionary of English

• Charles Wheatstone — Wheatstone, drawn by Samuel Laurence in 1868 Born 6 …   Wikipedia

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• microscope — /muy kreuh skohp /, n. 1. an optical instrument having a magnifying lens or a combination of lenses for inspecting objects too small to be seen or too small to be seen distinctly and in detail by the unaided eye. 2. (cap.) Astron. the… …   Universalium

• Timeline of electromagnetism — The timeline of electromagnetism, that is the timeline of the human understanding of electromagnetic forces, dates back over two thousand years ago. It lists, within the history of electromagnetism, the associated theories, technology, and events …   Wikipedia

• Corneal tattooing — is the practice of tattooing the cornea of the human eye. Reasons for this practice include the improvement of cosmetic appearance and the improvement of sight. Many different methods and procedures exist today, and there are varying opinions… …   Wikipedia

• Wheatstone , Sir Charles — (1802–1875) British physicist After a private education in his native city of Gloucester, Wheatstone began business in London as a musical instrument maker (1823). His early scientific researches were in acoustics and optics and his contributions …   Scientists

• Compass — This article is about the direction finding instrument used in navigation. For other uses, see Compass (disambiguation). A simple dry magnetic pocket compass …   Wikipedia

• Electronic tuner — Pocket sized Korg chromatic LCD tuner, with simulated analog indicator needle The term electronic tuner can refer to a number of different things, depending which discipline you wish to study. In the Discipline of radio frequency electronics an… …   Wikipedia