686 



SAW-MILLS 



from behind into contact with the saw. No time is lost, as in 

 forest saw-mills, in reversing the butt-camajre while butts and 



Fig. 305. 



I I I I I III I I I I I II II II II II II IT 

 I I I I I I I I I I I I I 



I I I I I I i ' I I i I : I 



lof(S of any len^'th may be sawn. Fifj. 300 shows the same saw 

 in perspective. 



In order to save time in sharpening' the saws (which must 

 generally be done every G or 7 hours) the frame with the saws 



