188 



FELLING AND CONVERSION OF TIMBER. 



to cut either way, with a bow that can be adjusted by means 

 of a screw. [A frame-saw used in the North 

 West Himalayas is shown in Fig. 107 ; the blade 

 is of thin rolled steel and the teeth slightly 

 set; it is kept stiff by catgut, which is twisted 

 tight by the small piece of wood a. Tr.] 



One-handed saws without a bow are 

 stiffened by increasing the thickness of the 

 blade, that diminishes from the teeth edges 

 towards the back of the saw ; they are used 

 for cutting poles or branches, and are called 

 " Fox-tail saws." 



Fig. 108 represents an American fox-tail 



Fig. 106. Ahler's 

 bow-saw. 



^^*'vv^A/^/^A/^A/vvw^''v\A.V^ 



Fig. 107. Himalayan saw. (After Fernandez.) 



saw made by Disston & Sons, Philadelphia, for forest work. 

 It is used for cutting logs of moderate thickness into lengths, 

 and is very serviceable. It is constructed in lengths of 3f , 4, 

 4J, 5, 5J, and 6 feet long, and costs Ss. to 10s. 



,a,^>^ 



los. 



In using saws for cutting-up poles from thinnings or coppice 

 the woodcutter improvises a sowing-block, on which he cuts up 

 the poles into billets. This mode of sawing firewood is 

 greatly preferable to cutting poles into lengths with the axe, 



