]J THE THREE-QUARTER SPAN 11 



observed, for the ad\'antages of independent houses 

 are many. 



With different growers of fruit trees in pots 

 there are different requirements ; in some cases 

 it will be necessary to advance, in other cases 

 to retard, the ripening of the fruits grown by them. 

 In an independent house this is easily accom- 

 plished, as the temperature can be increased or 

 decreased at pleasure. Another great advantage 

 is, that during the winter months the whole of the 

 trees grown in two houses during the growing 

 season may be placed in one house. The other 

 house can then be used for another purpose until 

 the growing season recommences, when the trees 

 can again be transferred to their proper quarters. 



The " THB.EE-QUARTER SPAN " AND " EEAN-TO 



HOUSES." — Although the " span-roofed house " is 

 by far the best, and should always be used if 

 possible, still, it may not be convenient for every 

 one to build them, yet there may be a good wall 

 to which a three-quarter span or lean-to house 

 could be easily attached, and so converted into a 

 very useful and profitable structure. 



It need hardly be stated, with regard to houses 

 of this class, that the details of construction should 

 be identical with those of the span-roofed house. 



It would be a grave error to have the house 

 too low at the eaves ; but let there be a good pitch, 



