1921] 
MATSUMOTO—SPECIALIZATION IN RHIZOCTONIA 19 
After the periods of time mentioned in table v about 5 cc. 
of the culture solutions for sugar determinations were removed 
to the transfer room previously mentioned. All the cultures 
were then again placed in the incubator until the next determi- 
nation. In this way contamination was entirely avoided and 
separate flasks were not required for each determination. After 
TABLE V 
THE GROWTH OF VARIOUS STRAINS ON POTATO DECOCTION* 
Per. of Reducing Starch 
Strain incub. Growth sugar remaining 
(days) (mgs.)t 
P1 5 2 5.82 4 
P4 5 3 9.71 4 
P 5 2 5.80 4 
Bl 5 1 5.82 6 
P1 6 3 5.82 2 
P4 6 3 13.59 2 
P7 6 3 3.88 2 
B1 6 1 10.68 4 
P1 8 043 gm. | 5.82 2 
P4 8 043 gm. 5.82 2 
P7 8 055 gm. 3.20 2 
B1 8 010 gm. 6.32 4 
P4 12 2 10.14 1 
P7 12 2 3.92 2 
B1 12 1 14.77 2 
B3 12 1 6.32 3 
Scl. lib. 12 1 14.77 1 
P4 15 3 16.60 0 
FT 15 4 5.82 1 
Bl 15 1 one 1 
B3 15 2 20.87 2 
Scl. lib. 15 3 21.15 0 
P4 25 . 160 gm. .51 0 
P7 25 .170 gm. .54 1 
B1 25 .020 gm. 25.67 1 
B3 25 . 100 gm. 16.45 0 
Scl. lib. 25 .175 gm. .91 0 
* Under the columns “Growth” and “Starch remaining" the numerals repre- 
sent relative amounts, in each case 1 representing a minimum positive quantity. 
f Reducing sugar as glucose in 10 cc. of medium. 
