MAINE AGRICULTURAL EXPERIMENT STATION. 



Fig. 1. Us'evzx-Spax Hocse. 



In making an uneven-span house the angle of the long span 

 with the horizontal is about thirty to thirty-five degrees; that 

 of the short side thirty-five to forty-five, sometimes more. - 



c. The Even-Span House: — This form, figure 2, is used mainly 

 for narrow propagating houses and for conservatories rather 

 than for commercial forcing houses. It is seldom used in a house 

 more than sixteen feet in width. Even-span houses should be 

 placed with the ridge running north and south. They have the 

 advantage of admitting the sunlight on all sides of the plants. 



Fig. 2. Evbn-Spau House. 



