Greenhouses, their construction and equipment . Fig. 14.—Types of forcing boxes or plant forcers for protecting tomatoes, eggplants, melonsand other heat-loving plants, and are re-moved as soon as continuous hot weatherarrives. They are used also for forcing rhu-barb, asparagus and other vegetables in earlyspring, and for perennial flowering Fig. 15.—iurciiig boxes in use on a commercial scale 30 GREENHOUSES GABLE ROOF SASH-BEDS Sometimes hotbeds and coldframes are made of two rows of sash set so as to form a gable roof. They have few advantages and many disadvantages when compared

---

Size: 2193px × 1139px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorkorangejuddc