SPLIT BAMBOO RODMAKING 157 



inches thick. Plane off the corners as indicated 

 by the dotted lines in Fig. 47. Plane very 

 carefully, a little at a time, then fasten the 

 two blocks temporarily in the vise while you 

 test the groove with the handy little gauge 



Fig. 49. Steel Angle Gauge. 



illustrated in Fig. 49. This is a center gauge 

 costing 25 cents at hardware shops, and it not 

 only has three 6o-degree notches, but scales 

 graduated in I4ths, 2Oths, 24ths, and 32ds of 

 an inch. As it is tempered steel, you can true 

 up the groove with it and with a three-cornered 

 file from which the handle has been removed. 

 Both the gauge and the file have angles of 60 

 degrees. The depth of the groove does not so 

 much matter as its shape, for on this depends 

 the character of your finished strips. 



When satisfied that one of the grooves is 

 correct, fasten the two blocks together with at 

 least four screws, reverse and true up the other 

 groove. 



We will assume, for the sake of brevity and 



