
          93

"I am still confident that the immediate cause of the disease called
yellows is a living organism, so small that its presence has
been overlooked by those who have studied the diseased tissues by
the aid of the compound microscope." p. 133.

"The well demonstrated contagious nature of the disease points
strongly to a something capable of growth and multiplication; no
mere chemical poison or simple exhaustion with vital debility"-p.
134.

"Having for reasons stated expressed the conviction that the
yellows is not due to the more highly organized parasitic fungi,
which send their vegetative system through the internal tissues and
produce their fruit or reproductive bodies only on the surface,
we reach by exclusion the probability of bacteria-like organisms,
and sufficiently account for their discover now by investigators 
by their exceedingly minute size.  Further such organisms have
been found (by myself) in great numbers in two different sets of
specimens [i.e. from So. Haven and Detroit].  Two lots of specimens
ought not to be allowed to decide a matter of so much consequence
and for myself these examinations would only be taken as
a strengthening probability, did not the published accounts 
strongly support the results reached.  Nothing can be clearer
from practical experience than that the yellows is contagious,
that the malady may be spread with the pruning knife or that it
does spread in some way from diseased to healthy trees in the orchard.
        