36 GREENHOUSES 



(4) It should be comparatively level, or gent- 

 ly sloping toward the south or southeast. 

 Hillsides, if necessary, may be utilized by 

 building houses of special design to be de- 

 scribed later. (5) An unfailing supply of 

 water at a reasonable cost should be assured. 

 (6) If the houses are to be erected in connec- 

 tion with other buildings, they should be on 

 the south side if possible. For most plants 

 the advantage of direct sunlight during the 

 whole day cannot be over-estimated. (7) 

 The possibility of enlarging the range by the 

 addition of more houses should not be over- 

 looked. 



Arrangement. The arrangement will de- 

 pend to some extent on the size of the range 

 and the purpose for which it is to be used. 

 If for private use only, convenience may 

 often be sacrificed for appearance ; but for the 

 commercial house the first thought in ar- 

 rangement is for economy in operation. 



For a commercial house the following 

 points in arrangement should be considered: 

 (i) The direction in which the houses are to 

 run. This will be fully discussed in Chapter 

 IV. (2) The distance between the houses. 

 This will depend on the size and height of the 



