New York AGricuLtuRAL Exprrtment Station. 157 
due to a gradual decrease in the supply of water in the soil, but 
that it had been brought about suddenly. Some time during the 
first two weeks in August, probably about August 9, the weather 
conditions (temperature, humidity and wind) had been such that 
the quantity of water transpired by the leaves was greater than 
the roots were able to supply. Asa result the leaves were scorched. 
Then, with the passing of the conditions which induced excessive 
transpiration, the roots were again able to meet the demands for 
moisture thereby enabling the plants to resume growth, although 
the soil was drier than at the time the injury occurred. 
Tt has already been stated that some of the plants were killed 
outright. Upon a third visit to the affected field at Stanley, 
made October 24, it was observed that these dead roots were still 
sound except for brown, mostly V-shaped, scab-like areas upon 
the upper portion of the root. These brown areas represent the 
later stage of the raised, discolored areas observed on August 29. 
The tissue was decayed to a depth of from one-eighth to one- 
quarter of an inch and had been quite generally eaten away by 
millipedes, leaving cavities where in the earlier stage of the di- 
sease there had been elevations. (See Plate VI.) Underneath 
the affected areas the sound tissue showed the same light brown 
discoloration as on Angust 29. It seemed to have progressed, but 
little, if any. Sometimes the browning occurred in the central 
portion of the root, but usually it was found only around the 
circumference and almost always in the form of concentric rings. 
In the field at Stanley the dead roots quite generally showed the 
light brown discoloration of sound tissue, but in an affected field 
at Bellona it was a common thing to find bad cases of the disease 
in which there was little or no internal browning. 
The plants which survived made a considerable growth of new 
foliage. The roots of such plants did not commonly show any 
discoloration or decay, but, strange to say, they averaged consid- 
erably smaller than the roots of plants which had been killed 
outright. This indicates that the plants which were the largest 
