47 



ate grafts inserted on July 10th in the latitude of Stamford, Conn., 

 began to burst their buds five or six days later. Immediate grafts 

 inserted at the same time began to burst their buds about fifteen days 

 later from buds of the year and about twenty days later from latent 

 buds in older scion wood. 



New shoots from these mediate apple grafts continued to grow 

 as they do in Spring grafting. Immediate apple grafts on the other 

 hand put out about six leaves from each bud and then came to a state 

 of rest with the formation of a new top bud. After about ten days 

 of resting these new top buds again burst forth and grew shoots like 

 those of the mediate grafts. 



The philosophy of these phenomena would seem to include the idea 

 that the mediate summer grafts had contained a full supply of pabu- 

 lum stored up in the cambium layer. The immediate summer grafts, 

 on tlie other hand, had contained only a partial supply of pabulum, 

 enough to allow them to make six leaves and a top bud. After a few 

 days of resting these shoots with meager larder could then go for- 

 Avard with new food furnished by the whole tree. 



Mediate and immediate winter grafts were alike in their method 

 of growth in the spring. This would seem to confirm the idea that 

 character of new growth is dependent upon the relative quality of 

 stored pabulum in the cambium layer. 



In experimental work it was noted that both mediate and immediate 

 winter grafts make a slower start in the spring than do the grafts in- 

 serted in springtime. This is perhaps due to the formation of a pro- 

 tective corky cell layer over wound surfaces. New granulation tissue 

 would then find some degree of mechanical obstacle in the presence of 

 a corky cell layer at first. 



Herbaceous plants allow of grafting. We are familiar with the 

 example of the tomato plant grafted upon the potato plant, furnishing 

 a crop of tomatoes above and potatoes below. 



It seemed to the author that the herbaceous growth of trees should 

 be grafted quite as readily. This seems to be not the case. A num- 

 ber of experiments conducted with grafting of the herbaceous growth 

 of trees in advance of lignification has resulted wholly in failure with 

 both soft wood and hard wood trees. 



The walnuts carried herbaceous bud grafts and scion grafts for a 

 long time however. These grafts sometimes remained quite green and 

 promising for a period of a month but lignification progressed in the 



