334 



NOTICES OF AUTHOES. 



when they change their naturally dark colours into 

 a faint yellowish green. Any vestige of withering 

 on the spruce or silver fir, is a sure prognostication 

 of approaching decay. Any kind of fir which has 

 lost its leader may he considered useless. 



" When plants are packed up in mats for the con- 

 veniency of carriage, strict orders should he given 

 that those which carry their leaves in winter he 

 taken up when they are entirely free from moisture. 

 If they he pulled wet, they will heat and get mouldy 

 in the packages. In the course of a few days good 

 plants are often spoiled in this manner." 



Mr Cruickshank does not swerve from the com- 

 mon foolish system, of inculcating a determinate 

 character of soil as generally necessary for each kind 

 of tree. We are angry with the dulness of the win- 

 ters on location of timher ; they will not comprehend 

 that a tree has two ends, hy hoth of which it draws 

 moistm'e, though from different elements, earth and 

 air. The dullest clown is sensible he requires to 

 drink more under an arid sun than under a drizzling 

 rain. The same holds of trees ; if there he little 

 evaporation of moistm-e from the leaves, and if the 

 leaves, instead of exhaling, can frequently even im- 

 bibe water, from the plant occupying an elevated si- 

 tuation, where the air the greater part of the season 



