3 88 
Journal of Agricultural Research 
Vol. XXI, No. 6 
manner as to overcome any inequality in inoculation. Plate 69, A, 
shows the frame filled in preparation for inoculation. The inoculum, 
as stated previously, is applied with an atomizer, all plants receiving as 
nearly as possible the same amount of material. A very fair degree of 
uniformity in the resultant infection is obtained as a rule by this method 
throughout the 10 plants of a variety. The results of one test are shown 
in Table I. 
Table I.— Experiment No. 2Q. Results of inoculation of four varieties of beans planted 
December g and inoculated December 31 at the rate of one sorus per plant; sori visible 
January 8 , sporulating January 10; count made January 17 
Plant N o. 
1 . 
2 . 
3 . 
4 . 
5 . 
6 . 
7 . 
8 . 
9 . 
10 . 
Total 
Tennessee Green Pod. 
Leaf No. x. 
Num¬ 
ber of 
sori. 
206 
134 
180 
299 
132 
337 
113 
245 
102 
I 3 2 ! 
Num¬ 
ber of 
flecks. 
1,880 
Area. 
Square 
inches. 
8- 73 
5- 32 
6. 33 
6. 00 
5- 98 
6. 23 
5- 30 
6. 10 
3- 98 
4- 47 
Leaf No. 2. 
Num¬ 
ber of 
sori. 
213 
86 
90 
269 
209 
156 
247 
240 
178 
144 
Num¬ 
ber of 
flecks. 
58. 44-1, 832 
Area. 
Square 
inches. 
8.47 
5 - 
6. 14 
5- 17 
5- 47 
6. 03 
5- 96 
6. 63 
4- 55 
4. 29 
McCaslan. 
Leaf No. 1. 
Num¬ 
ber of 
sori. 
45 2 
310 
225 
205 
142 
400 
286 
278 
35 6 
263 
57. 90.2,917 
Num¬ 
ber of 
flecks. 
Area. 
Square 
inches. 
IO. 64 
8- 53 
10. 60 
5- 2 3 
5- 35 
6. 60 
6. 98 
6. 00 
5- 4o 
6. 80 
Leaf No. 2. 
Num¬ 
ber of 
sori. 
194 
319 
281 
221 
163 
I 9 I 
2 57 
302 
352 
134 
72. 13 2,414 
Num¬ 
ber of 
flecks. 
Area. 
Square 
inches. 
9-37 
7. 90 
9- 5 2 
5- 7 2 
4- 95 
5- 97 
7- °3 
6. 40 
5 . 60 
6. 20 
68. 66 
Plant No. 
1.. 
2 .. 
3- 
4 - . 
5- - 
6 .. 
7-- 
8 .. 
9.. 
10. 
Total 
Improved Goddard. 
Leaf No. 
Num¬ 
ber of 
sori. 
Num¬ 
ber of 
flecks. 
196 
140 
76 
106 
148 
Il8 
136 
7 1 
9 1 
i 39 
1, 221 
Area. 
Square 
inches. 
10. 90 
IO. 78 
8. 78 
9-45 
13- 79 
ii- 55 
ii- 37 
13- 85 
9. 86 
i5- 5° 
ii5- 83 
Leaf No. 2. 
Num¬ 
ber of 
sori. 
Num¬ 
ber of 
flecks. 
158 
78 
82 
53 
137 
179 
93 
179 
9 2 
139 
1,190 
Area. 
Square 
inches. 
11. 80 
12 . OO 
8.97 
IO. 40 
14.13 
12. it: 
10. 55 
13. 90 
9. 70 
15- 54 
119. 14 
Dwarf Black. 
Leaf No. 1. 
Num¬ 
ber of 
sori. 
353 
Num¬ 
ber of 
flecks. 
Square 
inches. 
42 
39 
39 
17 
3 
28 
10 
20 
3 1 
32 
261 
Area. 
53- 2 5 
Leaf No. 2. 
Num¬ 
ber of 
sori. 
26 
36 
47 
i 7 
3 i 
10 
14 
65 
4 i 
28 
3i5 
Num¬ 
ber of 
flecks. 
25 
30 
19 
9 
12 
4 
16 
22 
34 
20 
Square 
inches. 
4 - 
I 9 I 
Area. 
40 
69 
69 
90 
43 
60 
94 
75 
35 
04 
5 2 - 79 
