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22 Results:
Heinerth photographs the under surface of the sea ice near Bylot Island. Photo credit: Jill Heinerth
10 m
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Arts & Design
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The veins of Mother Earth: Underwater cave exploration with Jill Heinerth

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Cassidy Swanston
Canada Science and Technology Museum
Jun 12, 2018
As a child, Jill Heinerth dreamed of being an astronaut. As a Canadian girl growing up in the twentieth century, this option didn’t seem accessible to her. Instead of a career that blasted her far above the Earth’s surface, she forged her own path deep within the Earth. She discovered a place where she could still explore hidden worlds, floating weightlessly. Although water is the lifeblood of our planet, we somehow know more about the cosmos than we do about our Earth’s own underwater caves
This circumferentor was made by Augustus Frederick Potter of Toronto, ca 1860. Source: Ingenium 1978.0718
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Exploration and Surveying
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Circumferentor

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Ingenium – Canada's Museums of Science and Innovation
Feb 7, 2017
The Circumferentor helped plot Canadian settlements and international boundaries. Circumferentors were used to plot Canadian settlements and international boundaries during the 1800s. A circumferentor, also known as a surveyor’s compass, measures horizontal angles and bearings. This instrument enables surveyors to establish grid lines and mark out territorial divisions such as political boundaries and personal properties. John McLatchie (1842–1908) owned this circumferentor. Born in Quebec, he
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