BEDS, BENCHES AND WALKS 149 



removable and may be replaced without tak- 

 ing down the frame. 



Iron frame benches with cypress sides and 

 bottoms are now much in favor. They are 

 but little more expensive than the all-wood 

 benches and are in most cases more satis- 

 factory, as the frames are nearly indestruct- 

 ible. They should, however, be made of 

 wrought-iron pipe rather than of steel. 

 They may be had in two forms, one in which 

 the bottom boards run lengthwise of the 

 bench and another in w r hich they run cross- 

 wise. The advantage of the latter is that 

 short lengths may be used. These benches 

 may be purchased with all parts cut to order, 

 or they may be easily cut by anyone familiar 

 with pipe cutting. 



Iron frame benches are also made of angle 

 iron or structural iron of different forms. 

 The chief disadvantage of these is that the 

 iron cannot be worked readily by the ordin- 

 ary workman and must be cut and fitted at 

 the factory. 



Concrete Benches. Concrete, because of 

 its permanency, is often recommended for 

 greenhouse benches, and its use is increas- 

 ing. In general, there are two separate 



