LUTHER BURBANK 
grafts from other seedlings put in their place for 
further tests. 
The usefulness of a tree as _.e basis of further 
experiments is not finished by any means when it 
has once been covered by grafted cions. The same 
process may be practised over and over. 
Doubtless no other observation made by the 
average amateur visitor is matter for greater sur- 
prise than this utilization of single trees for the 
carrying out of vast numbers of experiments. The 
utility of the method, in the saving of both land 
and the experimenter’s time, is altogether obvious 
ence attention is called to it. Yet relatively few, 
even among professional fruit growers, have hith- 
erto gauged the possibilities of the method. 
Of course the average visitor who inspects my 
gardens has no thought of becoming an experi- 
menter on a large scale, and hence would not have 
occasion to practise multiple grafting and regraft- 
ing on any such scale as that employed at Santa 
Rosa and Sebastopol. But I call particular atten- 
tion to this matter of fruit-tree grafting, because 
there is a lesson in it not merely for the profes- 
sional fruit grower but for tens of thousands of 
persons scattered across the length and breadth of 
the country who have in their gardens a few fruit 
trees, at present of no apparent value, that might 
be made to bear in abundance. 
[38] 
