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edges may be met with. There is for instance a marker 

 with a square opening- in the head instead of a three 

 sided one. There is an improved Jebong knife with a 

 square cutting edge, and a bar shaped blade instead of 

 a flat one. Other knives with a square cutting edge are 

 more complicated. Miller's tapping knife (fig. 38c. No. 2) 

 is a kind of marker with a square opening, and in front 

 of and behind this opening there is a projecting part 

 which allows the tool to glide easily and prevents cutting 

 too deeply. 



Sculfer's knife (fig. 38c. No. 3) has a bar to which a 

 blade is attached. Both of its edges are sharp, and the 

 sides are furnished with bent strips which have the same 

 use as those in Miller's knife. 



The Barrydo Tapping knife (fig. 38c. No. 4) is made 

 on the same principle as Sculfers's, only the blade is 

 changeable, and the strips continue so that the blade is, 

 as it were, attached to a hexagon. The main objection to 

 the three last mentioned knives is that the cutting edges 

 are straight. In the process of tapping it is necessary 

 that not only the underlip of the wound should be shaved 

 down, but also the bark itself. This is possible with the 

 Michie-Golledge todl, because there are two cutting edges, 

 placed at an angle, but this is not so with the other 

 three tools mentioned, and these knives have to be worked 

 twice over the cuts, once around the underlip of the wound 

 and once in order to shave down the bark. 



There are many more complicated knives in use in 

 the industry, and for details reference should be made 

 to the catalogues of such firms as Messrs Walker, Sons 

 and Co., of Colombo, Ceylon, or The Planters' Stores 

 and Agency Co., of Kuala Lumpur in the Straits. 



