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A rear-view mirror is a mirror in automobiles and other vehicles, designed to allow the driver to see rearward through the vehicle's backlight (rear windshield or windscreen). In cars, the rear-view mirror is usually affixed to the top of the windshield on a double-swivel mount allowing it to be adjusted to suit the height and viewing angle of any driver and to swing harmlessly out of the way if impacted by a vehicle occupant in a collision. The rear-view mirror is augmented by one or more side-view mirrors, which serve as the only rear-vision mirrors on motorcycles and bicycles. == History == Among the rear-view mirror's early uses is a mention by Dorothy Levitt in her 1909 book ''The Woman and the Car'' which noted that women should "carry a little hand-mirror in a convenient place when driving" so they may "hold the mirror aloft from time to time in order to see behind while driving in traffic". However, earlier use is described in a trade magazine in 1906, noting mirrors for showing what is coming behind now popular on closed bodied automobiles, and to likely be widely adopted in a short time. 〔The Automobile (weekly), Thursday, December 27, 1906, p.910〕 The Argus Dash Mirror, adjustable to any position to see the road behind, appeared in 1908.〔Cycle & Automobile Trade Journal, December 1, 1908, p249〕 Earliest known rear-view mirror mounted on a racing vehicle appeared on Ray Harroun's Marmon race car at the inaugural Indianapolis 500 race in 1911.〔(Ward's Auto World: Rearview Mirror )〕 Harroun himself claimed he got the idea from seeing a mirror used for a similar purpose on a horse-drawn vehicle in 1904.〔Davidson, Donald ''The Talk of Gasoline Alley'' (radio program). Accessed via WIBC (FM), 28 May 2006〕 Harroun also claimed that the mirror vibrated constantly due to the rough brick surface, and it was rendered largely useless. Elmer Berger is usually credited with inventing the rear-view mirror, though in fact he was the first to patent it (1921) and develop it for incorporation into production streetgoing automobiles by his Berger and Company. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rear-view mirror」の詳細全文を読む スポンサード リンク
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