34 Agrlcidtu nil Ivxperhnent Station UeHearoh lialhtin 
iiutrioiit agar, the original acidity of which was +8. Phenol- 
])hthaleiii was used as an indicator. The results presented in 
4'ahle 7 do not include the ineasureinents of colonies on cultures 
the acidities of which were above +25, for the reason that the 
inediuin was licpielied by so large an amount of acid. Fairly good 
growth was obtained thereon, however, in 4 or 5 da}’S. 
Table T. — Groiotli of F. tracheiphiluin at varying degrees of 
acidity. 
Age of 
colony 
in hours 
Diameter 
of cc 
)lonies in mm. 
at various degrees of acidity- 
+25 
+20 
+15 
+ 10 
+5 
0 
—5 
—10 
—15 
— 20’ 
1—25 
—30 
—35 
—40 
24 ... . 
9 
10 
9 
9 
9 
9 
10 
10 
10 
N 
8 
42 ... . 
26 
25 
* 22 
22 
24 
21 
21 
20 
18 
19 
18 
68 ... . 
43 
48 
41 
42 
37 
33 
32 
30 
29 
27 ' 
j 
24 
1 1 
24 
1 
22 
22 
92 ... . 
115 
55 
55 
48 
43 
40 
37' 
36 
1 
' 36 
36 
34 
34 
66 
64 
66 
66 
1 
44' 
i 42 
42 
42 
! 
140 
77 
1 78 
74 
72 
63 ^ 
60 
60 
j 53 
50 
53 
i 52 
1 53 
48 
49 
165. . . . 
83 
83 
80 
80 
1 
69 
67‘i 66 
1 1 
60 
1 67 
. 63 
63 
62 
|e2 
62 
The strain from soy bean 
Age of 
colony 
in hours 
24 ... . 
« 
Diameter of colonies in mm. at various degrees of acidity ^ 
+25 
+20 
+ 15|+10 
+ 5 
0 
— 5 
—10 
1 
—15 
—20 
— 25 
—30 
—35 
1-40 
12 ’ 
9 
7 
7.5j 
9.5 
9 
9 
1 ' 
6 
** 1 
i ^ 
42 ... . 
23 
24 
18 
20 
23 
1 
22 
21 
H, 
18 
1 
17 
1 
17 
1 1 
18 j 
1 
68 ... . 
40 
41 
38 
39 
1 
35 
34 
33 
1 1 
i 32 
1 1 
1 
31 
1 
1 
28 
1 I 
28 
I 1 
' 28 
25 
1- - 
25 
1 
92 
53 
53 
• 
47 
46 
44 
39 
38 
i 
39 
' 89 ' 
' 40 
! 36 
i 1 
35 
1 
115. . . . 
60 
62 
62 
64 
47 
47 
40 
! 39 
140 
69 
73 
70 
72 
66 
64 
10 
55 
55 
00 
ol 
t 
50 
47 
165 
83 
83 
! 79 
1 
80 
76 
1 
1 
68 
' 68 * 
: 63 
1 
67 
1 
' 68 ' 
' 67 
! 60 
1 
57 
The strain from cowpea 
'Contaminations. 
•The fiKurcs are approximate to within 2 or 3 mm., ami are an average of the 
urcments from ten plates. 
