Allan Gardens Conservatory; Allan Gardens, Toronto, Ontario.
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Buffalo and Erie County Botanical Gardens; Buffalo, New York.
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Tropical Gardens; Chinguacousy Park; Brampton, Ontario.
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Art Gallery of Burlington; Burlington, Ontario.
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From the Wikipedia entry:
The structure was notable for how it dealt with atmospheric expansion. During the day, the heat from the sun caused the air inside to expand and during the night it cooled and contracted. To avoid having to deal with the huge forces that maintaining a constant volume would create, the structure had large diaphragms kept in domes called "lungs".
(Above the round hole in the above pic, not visible here, was the large round diaphragm, which moved up and down as needed.
Now, it isn't used any more, as the system isn't completely sealed from the atmosphere and weather effects; some air and moisture are allowed in / out through some openings.)
Biosphere 2; Oracle, Arizona.
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