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Create AccountAir Profile Recorder (APR), a narrow-beam recording radar altimeter designed to provide topographic profiles for use in the mapping of wilderness areas. The instrument employs a 3.2 cm pulse transmitter that feeds a parabolic radiator, mounted below the aircraft.
Mechanical instruments (non-electronic). Machines designed to produce music mechanically, sometimes with an operator but without a performer and without the aid of a loudspeaker.
Historical IntroductionExhibitions by definition are displays shown for a limited time period, either in one location or on tour, unlike permanent or changing displays in museums.
The craft of carpentry involves the shaping of wood for architectural, utilitarian or ornamental purposes. European colonists who settled what is now Canada brought with them a rich heritage of CRAFTS and craft tools.
Woodenware, or treen, simple, small objects made entirely of wood, usually by home craftsmen who were their own carpenters, joiners, carvers and turners. Normally, woodenware was made from a single piece of wood (block or plank, rough or milled), cut, hollowed or turned but rarely joined.
Motor vehicle registration figures appear for the first time in The Canada Year Book for 1916-17. It was in this year that the Year Book accorded motor vehicles a new status as the most important means of transportation in Canada.
Canadian agriculture changed rapidly between 1850 and 1900, and changes in agricultural implements both caused and reflected changes in other sectors.
In Canada the Gregorian calendar is in use under the terms of the 1750 British Act for Regulating the Commencement of the Year, and for Correcting the Calendar Now in Use, which switched the official English calendar from the Julian to the Gregorian form in 1752.
A travois, from the French word travail, “to work,” was a device used for transportation by the Plains Indigenous peoples. Drawn by horses or dogs, the travois carried people’s goods to and from hunting sites and temporary settlements.
