SHADING ORCHIDS. 



61 



For the roof the blinds 

 are best hung on rollers, and 

 the simpler the form of these 

 the better. A pulley-and- 

 cord arrangement will be 

 needed, an easy and effective 

 way being shown in Fig. 29. 

 A light boxing may be pro- 

 vided on the ridge for protec- 

 tion, or the blind may be 

 fitted with hooks, and the 

 ridge with screw-eyes for 

 taking the roller and blind 

 down in the autumn. In all 

 cases blinds of this nature should be raised above the roof, to allow a current of air 

 beneath them. In the section (Fig. 30) this is shown, the material used for the 

 support being ^-inch round iron turned up at the end to receive the roller. Several 



References . 



blind 



Fig. 29. Tiffany Roller Blind. 



; b, pulleys ; c, cord ; d, strong screw eye in ridge. 



other kinds of materials are used for 

 those mentioned are the best of all. 



Fig. 30. Tiffany Roller Blind 

 (Sectional View). 



References :- a, roller blind; b, light iron rod to 

 elevate the blind ; c, draw cord. 



shading, including bunting and linen; but 

 It will be necessary to shade the ends of 

 the house as well as the roof, and for this 

 light wooden frames may be made to fit the 

 glass, and covered with netting or whatever 

 may be used. 



It is impossible to give directions for 

 shading that will meet all cases, as orchids 

 from different localities vary in the amount 

 of shade they need. Even the species in 

 one genus cannot all be treated alike. Take 

 leelias as an instance. The Mexican kinds, 

 of which L. anceps is the best known, 

 require practically no shading, while the 

 Brazilian kinds generally, such as L. pur- 

 purata and others, must be shaded more or 

 less heavily. All the cool-house species of 



