File:PSM V23 D638 Sectional view of house heating by hot air circulation.jpg
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DescriptionPSM V23 D638 Sectional view of house heating by hot air circulation.jpg | Sectional view of house heating by hot air circulation | |||||
Date | ||||||
Source | Popular Science Monthly Volume 23 | |||||
Author | Unknown authorUnknown author | |||||
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current | 16:14, 30 August 2010 | 1,671 × 1,816 (397 KB) | Ineuw (talk | contribs) | {{Information |Description = Sectional view of house heating by hot air circulation |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_23.djvu/638 |Date = 1883 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} |
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