154 
POPULAR SCIENCE REVIEW. 
The physiology of cell life does not at present help us very 
much in the elucidation of the effects produced by grafting. 
Those who deny that any effect is produced beyond adhesion 
of the graft to the stock, and the transmission of fluid from the 
roots through the latter to the scion, have anatomy in their 
favour. The tissue below the graft is that of the stock ; above 
it, it is that of the graft — at least under ordinary circumstances. 
Moreover, it is well known that to a large extent each cell is 
independent of its neighbour, and often contains very dif- 
ferent ingredients, without any intermingling of the contents 
of adjacent cells. This is well shown in the case of the red 
beet grafted on the white beet — the two retained perfectly 
their respective characteristics above and below the union — as 
well as by other illustrations previously cited. But, on the 
other hand, this fact should be compared with the transposi- 
tion of characters presented by the two carrots alluded to in 
an earlier page. Those who lean to the view that stock does 
affect scion and scion stock have only exceptional aid from 
anatomy ; but physiologically, they may avail themselves of the 
circumstance that the passage of fluids, and to some extent the 
direction of new growth, are now known not to be limited to 
any single course, but to take place in any direction, accord- 
ing to circumstances. 
EXPLANATION OF PLATE LXXI. 
a to c, Abutilon. 
a. Stock of normally green-leayed Abutilon, on wbicli at b is grafted a sciom 
of the variegated Abutilon Thomsoni. 
cc are branches of the stock, the leaves of which have become variegated in> 
consequence of the grafting. 
d, e, Roses. 
d } a white moss-rose. 
e, a red smooth-stemmed Quatre-Saisons rose, proceeding from the same 
branch as e, possibly as a result of grafting. 
