70 
THE NATIONAL NURSERYMAN 
NEW POWER TREE-DIGGER 
What E. A. Jackson the originator and manufacturer 
says of the New Power Tree Digger 
The great problem of tree-digging has been solved by 
the machine shown in the accompanying photograph. 
With three men and this machine 50,000 trees can be 
dug easily in a day, using about ten gallons of luel, 
which is exceptionally economical, considering the 
amount of labor saved by it. 
The operation of the machine is very simple, the 
photograph being self explanatory. The 30 h. p. engine 
geared to the drums, wind in the cables attached to the 
cutter. The heavy gear reduction gives a tremendous 
draw-bar pull and pulls the cutting knife with a very 
large lifter, making the hand pulling of the trees easy. 
When one row is cut the machine moves itself over in 
front of the next row with its own power. 
Some of the important features of the machine are that 
the trees can he dug as deeply as desired in the driest or 
wettest ground, no trees are injured, a space of twenty 
feet is ample for operating the machine at the end of the 
rows of trees. 
As tractors cannot easily be used to dig trees and 
horses are getting to be out of the question, this ma¬ 
chine is meeting with great favor in California, where 
it originated and is being manufactured. 
The wear and tear is very small, being a semi-sta¬ 
tionary outfit. 
February 5, 1920. 
Editor National Nurseryman, 
Dear Sir:— 
The article published in your February issue by W. 
A. Ritter, of Napoleon, Ohio, reminds me that more than 
50 years since it was a common complaint among the 
farmers of Chester County, Pa., where I then resided, 
that at times their grain crops were seriously injured 
by rust. Nobody then suspected the Berberis as the 
cause; it was attributed to weather conditions. 
Barberry was not indegenous in that locality and I do 
not remember seeing any in cultivation. There has 
been no material change during the intervening years. 
Doubtless some barberry plants have been cultivated 
but the conditions in that particular are not greatly 
changed. The old and the new generation of farmers 
have pursued the even tenor of their way and in recent 
years are growing more wheat than they did 50 years 
ago and are probably unaware of the menace or sup¬ 
posed menace from the barberry plant. 
Is it not possible, even probable, that this menace is 
more suppositious than real and that the F. H. B. is 
beating the air in an endeavor to justify their existence. 
They are forever discovering new insect pests and for¬ 
getting entirely the old ones that in their day of intro¬ 
duction were heralded as the certain harbingers of agri¬ 
cultural and horticultural doom. Now they leave the 
potato beetle and the San Jose scale to the mercies of 
nature and the interests of productive husbandry. 
Today it is the brown tail moth and more recently the 
Japanese beetle that will be our undoing except these 
horticultural and agricultural experts are permitted to 
spend a lot of money for their control and extermination. 
The first at any rate is beyond the power of man. It is 
certain that very many colonies of brown tail moth are 
established in widely divergent territory in our country. 
If the experience in the neighborhood of Boston is re¬ 
peated it will be some years before these colonies will 
develop sufficiently to be noticed and by that time these 
experts will likely discover a new menace leaving the 
