98 



Journal of Agrkult(ii( , Victoria. [10 Feb., 191^ 



the knife must be very sharp, and used with a saw-like action, care being taken to 

 always keep the blade in the same plane. A guide and a special knife have been 

 devised, which permit of the graft being executed without cutting too deeply 

 into the stock." 



This graft, which is very popular in France, has also been tried 

 with successful results, though on a rather limited scale by several 

 Victorian growers. It is convenient to execute when the stocks are 

 rather too large for the Yema graft, in which case the cleft should not 

 penetrate as far as the ,pith of the stock, as would be the case when 

 stock and scion are of the same diameter. With rather large stocks, 

 it is as well to commence cutting the scion at a different level on the 

 two sides; the one against the stock being the higher. In other respects, 

 and as regards subsequent treatment, what has been written above con- 

 cerning the Yema graft applies also to the Cadiallac graft. 



Fig. 11. — The "Cadillac," or Side -cleft Summer Graft. 



Theoretical Considerations. 



Without going fully into the details of the rather complicated 

 mechanism by which stock and scion become united in the graft, one 

 or two points in connexion therewith may be briefly outlined, the 

 proper understanding of which should prove of use to the practical 

 grafter. 



It must be remembered that in any form of graft the woody tissues 

 of stock and scion never unite — what was already wood prior to graft* 

 ing cannot do so — the new layers of wood, however, both of stock and 

 scion, which have formed subsequently to the operation of grafting. 



