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Dan Gibson in a canoe recording in Algonquin Park, Canada, with his Stereo Parabolic Microphone. Source: Library and Archives Canada/e011163804
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Earth & Environment
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The Dan Gibson Parabolic Microphone

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Library and Archives Canada
Dec 3, 2015
Daniel Armstrong Gibson was born on January 19, 1922. He was a photographer, filmmaker and sound recordist who dedicated his life to capturing the sights and sounds of the wilderness. It was at Algonquin Park’s Camp Ahmek, where Gibson attended as a camper, and later as a staff member, that he fell in love with nature. Gibson began his career in photography in 1940, and then went on to filmmaking, eventually creating Dan Gibson Productions. While filmmaking, Gibson was routinely faced with the
Barometer: recording Canada's highest elevation
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Earth & Environment
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Barometer: recording Canada's highest elevation

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Ingenium – Canada's Museums of Science and Innovation
Aug 24, 2015
This barometer is an aneroid type: an aneroid is a flexible metal chamber partially evacuated of air that is sensitive to changing air pressure. It can be used to record altitude as air pressure decreases with vertical distance from sea level. In climbing Mount Logan, expedition members identified Canada’s highest peak and helped to refine aneroid barometers as a tool for GSC surveyors. This barometer recorded the elevation of Canada’s highest mountain during a 1925 mountaineering expedition and
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