253 



wood ; that article should, in every case, 

 be made subservient to this purpose. No 

 other rules can, or need, be laid down for 

 the business, than that so much is to be 

 constantly left, as will materially check 

 the currents of the winds, while none is 

 to be suffered to overhang or crowd the 

 produce of the stools. — If the latter, 

 jointly with the underwood, produce 

 shelter below, the trees would shelter each 

 other above; as, under a good system, 

 there would be many of different heights, 

 each having a moderate top, none a large 

 one. 



If the management of sap and shelter 

 be properly attended to, they will include 

 the third point, namely the prevention of 

 defective timber ; except so far as relates 

 to Draining, &c. which has been adverted 

 to, p. 120. 



As this outline includes the idea of 

 taking down the timber, whenever either 



