ic6 



SEEDS, BUDS, BULBS. 



fed from the want of a due oxygenation of the j 



Sect. IX. 2. 7. 



;s, from which 



it is fecreted ; though its 



glands may probably alfo receive fom 



e 



oxygenated bJood by the inofculation of the vefTels of different bud 



whether flower-buds or leaf-bud 



with each other In the bark, 011 



fuppofition that they are not all of them totally deflroyed. 



7. In the axilla of each leaf is generally produced about midfum- 



or a flower-bud ; if it be a leaf-bud, it 



mer 



th 



leaf- bud 



becomes a branch the next year, prod 



many oth 



and 



J 



many other buds ; if it be a flower-bud, the growth ceafes 



termi- 

 g in the feed. During the greater vigour of the plant the leaf 



buds are folely or principally produced, as 



y 



healthy 



as 



the 



but when the vefl:els of the bark become further elongated 



O 



plant grow5 taller, the nutritive juices are lefs coploufly fupplied, or 



the buds are become more mature, and the produdlon of flower-buds 

 fucceeds as in 



the fpring was two or three weeks later in afcend 



Mr. Walker's experiments the fap of the birch 



the top of 



high tree, than to the lower branches. Edinb. Tranfa^. Vol. I 

 Hence it happens, that the grafts from flrong feedling appl 



do not bear fruit, till they are twelve or twenty years old ; w 

 grafts from old weak trees will bear coploufly in two or threi 



years 



d h 



y 



pears, produce fruit only at th 



extremities ; but if you decorticate about an inch of a branch of a vi- 

 gorous pear-tree, and thus weaken it; that branch will flower, and 

 bear fruit at every bud like trees of lefs vigour. 



It fhould be here obferved, that the words ftrength and weaknefs, 

 when applied to the growth of vegetables, are in reality metaphorical 

 terms ; or exprefs the effect or confequence of their producing leaf- 

 buds or flower-buds, rather than thecaufe of it, whereas it is the fa- 

 cility with which the lono; caudexes of the new buds, which form 



the new filaments of bark, can 



be generated. 



which increafes the 



number of leaf-buds, and gives the tree a luxuriant or vigorous ap- 

 pearance ; and the difficulty of generating thefe new caudexes which 



increafes 



S^^ 



Inc 



toi 



tha: 

 feec 



the 

 tior 

 as \ 



ftat 

 the 

 bra 

 lie 



Vii 



bl 



riz 

 mi 



vii 



tu 



11 

 l: 



f 



u 



\ 



