The Orchid Doctor Articles under the Heading Solar Chimney

Solar Chimney Comments
SOLAR CHIMNEY: A Ventilator for Greenhouses It harnesses the heat of the sun for a chimney 2 feet square rising 12 feet above the greenhouse roof, painted black on the inside except for the south exposure which is glazed, with a trap at the base which is level with the roof and which opens when an updraft is caused by the sun heating the chimney; the hotter the temperature, the greater the updraft; all details, refer to AU84-11 0

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  1. Kelly Longley asked question fredclarkeara kelly longley in category General Discussion
  2. Harriet Schiele started topic Chloraea Magellanica in category General Discussion
  3. Marcia Whitmore asked question Find Zygoneria Adelaide Meadows in category General Discussion
  4. Roberto Lizama asked question Help to identify this Spiranthes from Guatemala in category General Discussion
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  1. Heather Williams commented on member plant Phal. equestris '‘996’' by Cara Anderson
  2. Heather Williams commented on orchid Paph. Vintner's Treasure
  3. Heather Williams commented on member plant Bct. Yuan Nan Mini 'Queen Anne' by Linda Thorne
  4. Heather Williams commented on member plant Pths. racemiflora 'Seagrove Golden Fiddles' by Linda Thorne
  5. Carol Holdren commented on topic "Chloraea Magellanica" by Harriet Schiele
  6. Carol Holdren commented on topic "fredclarkeara kelly longley" by Kelly Longley
  7. Carmen Bou-Crick commented on member plant Oncostele Wildcat var. 'Golden Red Star' by Carmen Bou-Crick
  8. Henry Shaw commented on scheduled event "Diablo View Orchid Society Orchid Show & Sale" by Diablo View Orchid Society
  9. Sharie Heckaman commented on member plant Paph. Magic Cherry by Linda Hartman
  10. Linda Hartman commented on member plant B. nodosa by Linda Hartman