A house based on the familiar thermos bottle theory has been constructed by a Californian. Between hollow walls there is vacuum, and it is claimed that the structure can be kept cool in summer and warm in winter at a small cost.
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Bibliographic details
Waipawa Mail, Volume XLIX, Issue 149, 7 September 1928, Page 2 (Supplement)
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42Untitled Waipawa Mail, Volume XLIX, Issue 149, 7 September 1928, Page 2 (Supplement)
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