1916] 1 
GILMAN—CABBAGE YELLOWS Bt 
condition. On July 10 symptoms of yellows showed in pots 4 
and 5; on July 14 the plants in pot 3 became diseased, but 
no disease was found in pots 1 or 2. The plants were plated 
on potato hard agar, and F. conglutinans was recovered from 
plants from pots 3, 4, and 5. None was found on seedlings 
plated from pots 1 and 2. Culture V, which upon reinocula- 
tion again produced the disease, was one of these cultures 
(table v). 
On May 27, 1913, a more extensive inoculation experiment 
was started; part of the pots containing the plants were placed 
in the greenhouse and part in the pathologieal garden. As the 
greenhouse was not heated, the difference of conditions was 
not noticeable, and, therefore, the results are combined. For 
this trial twenty pots were planted to cabbage. These pots 
were in duplieate, ten being placed in the greenhouse and ten 
in the soil of the garden. The treatment of the soil in these 
pots was as follows: Eight pots contained soil from the ex- 
perimental plots at Raeine, and eight others normal green- 
house soil These sixteen containers were sterilized in an 
autoclave at eleven pounds pressure for four hours. Four 
of each of them were used as controls, four were inoculated 
with pure eultures of F. conglutinans, and the remaining four 
were inoculated with wilted leaves of the diseased plants. Two 
pots of normal greenhouse soil and two of normal diseased 
soil were added to the series as controls. The cultures were 
added by mixing them with the surface soil in the pots. The 
seed used were not good, and, therefore, the plants did not 
eome up well, so that in the following pots there were no 
plants: one pot of diseased soil sterilized but not inoculated ; 
two pots of diseased soil sterilized and inoeulated with pure 
cultures; two of diseased soil sterilized and inoculated with 
the leaves; one pot of normal greenhouse soil not inoculated ; 
and one of sterilized greenhouse soil inoculated with leaves. 
The results of this experiment are given in table rrr. 
