
          191

10.  "Trees standing in places where people are passing
to and fro very often near them,  though not exempt from the
disease, appear less liable to it than others.  This is
strikingly exemplified in the city of New Haven, where trees
standing close by the sidewalks, outlive all others.  The
same fact I have observed upon my own premises."
[I have observed opposing facts around negro cabins in Washington
where the earth was trodden hard by many feet.] 
I saw two such trees badly diseased in all facts in
July 1888.  I found both dead in [illegible] of same year.
Much to my surprise, for they were apparently first disd [diseased] in
1887.

11. "Luxuriant and vigorous growth is no protection
against the disease. x x Slow growth is, perhaps, ( I can
not speak confidently ) favorable to health."

12.  "When the disease commences in a garden or orchard
containing a considerable number of trees, it does not attack
all at once.  It breaks out in patches which are progressively
enlarged, till eventually all the trees become victims
to the malady.  Thus in an orchard of two and a half acres
all the trees were healthy in 1827. The next year two trees
on the west side of the orchard, within a rod of each other,
took the yellows.  In 1829, six trees on the east side of
the orchard were attacked; five of them standing within a
circle of four rods diameter.  In 1830, fifteen more were
attacked; fourteen of which stood within a circle of four
diameter.  A similar fact is now [1844] apparent in my neighborhood.
A fine lot of 200 young trees, last year in perfect health,
now show disease in two spots, near the opposite ends of the
        