Rod-making. 



285 



them together. If the angle is incorrect, remove the 

 handle of your triangular file, and rub it to and fro in 

 the groove until the error is rectified. 



Fig. 69. 



Should you conclude to order a plane for the purpose, 

 consult a hardware dealer or a carpenter as to the 

 maker. My plane cost $1.90. Make a sample of the 

 groove you wish, and send with order, to lessen the pos- 

 sibility of mistake. 



The grooved strips in which you intend to finish the 

 component parts of each joint should be of hard wood 

 pine will serve for the others. For since a joint of this 

 kind cannot well be altered after it is glued together, it 

 is plain the taper and consequent action of the rod must 

 be determined at the same time with the angle, and this 

 without the opportunity for trial and local modification 

 which a wooden rod affords. Therefore some definite 

 rule for this must be established at the outset. Perhaps, 

 all things considered, a true taper for each joint promises 

 the most certain result at all events for the middle 



