The Garden Under Glass

^0 H THE GARDEN UNDER GLASS A Plant Propagator This is a necessity to the greenhouse owner. He may easily fix one over the hot-water pipes at their hottest part, enclosing the pipes with zinc, slates, or bricks (boards would be likely to warp) in order to direct the heat up wards and bring about the condition known as bottom heat. The bottom of the propagator, which should con-sist of ordinary roofing slates, should be about six inches Diagram 9.—Block of Fruit, Plant Houses and Pits: a, vinenes; b, peach houses ; c, plant houses ; d, conservatory; e, pits and frames. above the pipes. If some material such as cocoa-nut fibre be placed over the slates to a depth of three or four inches the pots and pans containing cuttings or seeds may be plunged therein. The propagator itself may consist of a box about 1 foot deep and 18 inches to 2 feet wide covered by loose sheets of glass 18 inches or 2 feet by 1 foot. These can easily be reversed three times a day or as often as moisture adheres to the inner surface. A cool propagator