852 On the Microscopic and General Characters of » [November, 
easily displaced, thus showing that one effect of the disease is a 
tendency toward disorganization. How far this character may 
extend, I am unable to say, but it was very marked in all the 
specimens sent me. I was unable to make thin sections for study 
until the parts were soaked in strong alcohol or chromate solution 
for some time. I am informed that a gentleman, whose name I 
am not able to obtain, claims that in nearly all the sections of dis- 
eased specimens that he examined, he noticed that a great num- 
ber of the cells of the pith and inner bark and many of those of 
the woody portions were ruptured and completely disorganized. 
Although I: have examined a number of sections, looking care- 
fully in each for ruptured cells, I have not been able to find any. 
Therefore I can only give the above statement on authority not 
being able to sanction it by my own work. I have no doubt that 
some one or more very important microscopical symptoms may 
be found, on the comparison of more specimens from many locali- 
ties, that are not enumerated above. 
5. Appearance of the unmagnified Section—A section of the 
trunk of a tree, well along in years, shows peculiarities to @ 
marked degree. One first notices the yellowish color which pet 
vades the whole section, with the rings marking the annual 
growths of a darker color, perhaps a light brown, and then the 
dark spots scattered through the woody portion. It very forcibly 
reminds one of a bilious state of the system. A section of the 
root presented nothing abnormal to the naked eye. 
6. Appearance of the Leaves—The leaves upon the diseased 
branches have a general sickly appearance, are of a pale color and 
more or less dried. Especially are the leaves of the abnormal 
shoots or branchlets characteristic; these are pale and often more 
or less curled. There seems to be a greater number of leaves 
than is normal, upon diseased trees, especially before it has lost 
the greater part of its vitality. This is not to be wondered at, as 
the leaves are really the lungs of the tree, the green matter acting 
the part of an absorbent. If now several of the branches become 
diseased and the leaves lose their power to act, it seems natural 
that in order to obtain that nutriment necessary for vitality, 25° 
signed to the leaves, more leaves would be formed upon ace 
healthy portions of the tree. Soon there has been so much of 
the nutriment of the tree used to overcome this gasping caused 
: by the diseased branches, whose trouble is steadily advancing t — 
