SAWS. 



181 



Courval has invented a pruning billhook (Fig. 84) which is 



16 inches long and weighs about 3J pounds; 



it is made thickest along its axis in order to 



add weight to its cuts. According to Courval 



all kinds of pruning, even of large boughs, 



may be effected with this instrument. 



Fig. 82. Fig. 83. Fig. 84. Fig. 85. Fig. 86. 



Forms of billhook. Courval's tree-pruner. American thorn-hook. 



The American thorn-hook (Fig. 86) is used for lopping ; its 

 head weighs 2f to 3 pounds.* 



2. Saws. 



(a) General Account. Saws are used by woodcutters for 

 felling trees, and for reducing the length of logs and branches 

 at right angles to their axis. A saw may be used for such 

 a purpose much more economically than an axe, which wastes 

 much of the wood. Under certain circumstances and on 

 difficult ground, the work may be done moi ? e expeditiously 

 with an axe. The amount of time spent in sawing may vary 

 from 20 per cent, to 40 and 70 per cent, of the whole time 

 of the woodcutters on the felling-area. 



May be obtained from J. D. Dominicus & Sons, Remscheid-VieringhauBen. 



