GRAFTING. 



109 



the ground where the young plants are decapitated and the 

 cleft made with the. grafting knife. One must be careful 

 while making the cleft to measure the diameter of the stock 

 with the slide. A scion of equal diameter is taken out of 



Fig. 84. 

 Comy's Grafting Knife. 



Fig. 86. 

 Champin's Grafting Knife. 



Fig. 86. 

 Kunde's Grafting Knife. 



the compartment corresponding to the measurement read on 

 the blade of the knife. This scion is placed in each of the 

 two grooves on the handle corresponding to the number of 

 the compartment, and the two bevels are made with the 

 sliding knife. The scion thus prepared is inserted in the 

 cleft and bound in the usual way. 



The use of this arrangement presents the following 

 advantages : 1st, it allows one to rapidly find scions of 

 diameter exactly equal to that of the stock ; 2nd, to make 

 perfectly plane and exactly symmetrical sections. 



(<?) Tools used for Whip-tongue Grafting. This graft is 

 easily made with an ordinary grafting knife. The only 

 special feature of this knife is that the blade is flat on one 

 side (Fig. 88) so as to allow the making of a perfectly plane 

 section. This can only be insured by sharpening the knife 

 on one side only, for the sharpening of the blade always 

 causes it to become convex near the edge (Fig. 87), inducing 



