THE YOUNG FARMER'S MANUAL. 437 



table is u^d. The carriage or table should always move parallel 

 with the sides of the saw. An ingenious sawyer will be able to 

 determine, by simply glancing his eye along the sides cf the saw 

 to some point on the carriage, whether the saw and carriage are 

 T^^^^Tor not. When the carriage or table is fitted up, the 

 saw must be hung to correspond with it ; but, when the saw is 

 already in the desired position, the table or carriage must be 

 fitted to the saw. To determine whether the carriage or table of 

 a circular saw for cutting wood is in range with the saw, push 

 the carriage back as far as it will go, and then place a board 

 having a straight edge on the carriage, with the straight edge as 

 close to one side of the saw as it can be and not hit it. Move 

 the carriage back and forth, with the straight-edged board on 

 both sides of the saw, and if the board remains just so far from 

 the saw, it is all correct. When there is a long carriage, run 

 one end of the carriage to the saw, and stick a nail where the 

 edge of the saw hits. Now, move the carriage so that the other 

 end will be at the saw, and stick another nail. Now, hold a long 

 straight edge against the side of the saw-plate ; and if in range, 

 the straight edge will point directly to these nails. If the feed 

 ing-table of a circular wood-saw does not range with the saw, it 

 will be almost impossible to saw off a large stick, because it 

 will bind against the sides of the saw, and almost stop the motion 

 of it if the power is limited. 



THE VELOCITY OF THE CUTTING EDGE OF SAWS. 



680. There is little danger of having the teeth of any saw 

 move too fast. The faster the cutting edge moves, the more 

 work a saw is capable of performing. When there is an abun 

 dance of available power, it is well to have a buzz-saw run with a 

 frightful velocity ; for it will saw much smoother and faster than 

 if it moves with less rapidity. But when the power is limited, 

 and it is desirable to lose none of that power, it is very impor 

 tant to have the cutting edge move at the most effective velocity for 

 the power which drives it. Some engineers say that the cutting 

 edge of a crosscut circular saw should move about seventy-five 



