220 AROUND THE YEAR IN THE GARDEN 



cheaply, and with them such a frame may easily be put up. 

 Then boards are used for the bottom of the bench, and may 

 readily be replaced. 



Heating the Greenhouse 



If hot water or steam is used in the dwelling house, the 

 heating of the small greenhouse is an easy matter. Where a 

 hot-air system is used for the house, a small hot-water coil 

 may be placed in fee top of the fire-box, and connected with 

 tj^g heating pipes in the greenhouse. Two "coils" of pipe 

 of five i -inch returns each, fed by two i^-inch flows, would 

 heat a lean-to, like that described, with hot water. The 

 boiler should be placed as much lower than the piping as is 

 practical an advantage already at hand when the green- 

 house is heated from the house cellar. For the detached 

 small greenhouse it is usually possible, if one will look around 

 a bit, to pick up a small secondhand hot-water heater, and 

 secondhand pipe, which, while not as neat and trim as new 

 material would be, will give satisfaction as far as supplying 

 heat is concerned. The heating system should be installed 

 under the direction of some competent person. A small 

 house, especially if it is to be used only for starting plants 

 in the spring, may be heated by a flue, although this method 

 is not so reliable as hot water. In case a flue is used, the 

 chimney should be built on top of the furnace. The flue 

 should then be carried to the other end of the house, or 

 near it, and back to the chimney. This provides a forced 

 draft, as the air in the chimney is heated as soon as the fire 

 is started, and sucks the hot air from the fire-box around 

 through the flue after it. If a flue is used, care must be 

 taken not to have any woodwork come in direct contact. 



