940 



THE BOOK OF GARDENING. 



plan to build the house from north to . south ; the east side will 

 get the sun in the morning and the west side in the afternoon, 

 while the solar influence will be equally distributed at the 

 middle of the day. The door should be made on the south 

 end, and th-e boiler fixed at the north end. If the house is to 

 stand by itself, it will be preferable to build it partly under 

 ground, so that it will not be quickly affected by atmospheric 



Fig. 614. — Plan of Propagating -House. 



A, A , Frames. 



B, B, Lights. 



C, C, Propagating Beds. 



E, E, Supports for Hot-water Pipes, 



F, F, Hot-water Pipes. 



G, G, Planks to Block the Heat under 



the Stages. 



H, Tablet. 



/;", h", Tablet Supports. 



7, /, Hooks to Fasten Lights. 



i, i, Rings to Fasten Lights. 



changes ; but if it has to be combined with another group of 

 houses, it will if possible be advisable to place it between two 

 warm ones. 



Side walls should be built with bricks. Wood should only be 

 used in the construction of the roof, for wood is the best isolater, 

 while iron, with its conductive properties, is too easily affected 

 by atmospheric influences. A few ventilators must be made on 

 each side of the roof. In propagating-houses air is very seldom 

 admitted at the bottom on account of all the heat being wanted 

 for the propagating-beds. 



