HOUSES TO BE RECOMMENDED. 



long span should face the 

 sun. The short-span-to-the- 

 south greenhouse, of which 

 much has been said in recent 

 years, is built with a very 

 steep, short south roof, with 

 the purpose of intercepting 

 nearly all the sun's rays and 

 carrying them directly back ? 

 into the farthermost corners x 

 of the house. Where high > 

 plants are to be grown near ^ 

 the front of the house, how- ^ 

 ever, so much shade is cast ^ 

 upon the rear plants as to H 

 seriously interfere with their 3 

 growth. These houses have 5 

 not yet come into general 

 use for vegetable forcing, " 

 and they need not be fur- ^ 

 ther considered in this sum- I 

 mary account. 



Of the various houses | 

 which are represented in the g. 

 accompanying illustrations, < 

 Fig. i is the least satisfac- 5 

 tory for forcing purposes, be- > 

 cause of its narrowness. In g 

 such slim houses there is * 

 not a sufficient body of air 

 to guard against rapid fluc- 

 tuations of temperature. 

 They cool off quickly ; and 

 with variations in temper- 

 ature there arise serious 

 difficulties with insects and 

 fungi. Fig. 2 is an excellent 



