May 19,1923 
Spores in the Upper Air 
601 
23 
34 
TablB I .—Results of exposing slides on airplanes 
lyocation. 
San Antonio, Tex..... 
-do. 
....do. 
....do... 
—do... 
Waco, Tex,, to San Antonio, Tex. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
San Antonio, Tex.. .... 
San Antonio, Tex., to Uvalde, Tex. 
_do. 
....do.. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
San Antonio, Tex., to Cuero, Tex. 
_do. 
.do. 
• do. 
.do. 
Omaha, Nebr. 
Kearney, Nebr., to Gothenburg, Nebr. 
North Platte, Nebr. 
North Platte, Nebr,, to Ogalalla, Nebr. 
Sidney, Nebr,. to Pine Bluff, Wyo_ 
Pine Bluff, Wyo., to Cheyenne, Wyo. 
Potter, Nebr., to Sunol, Nebr. 
Gothenburg, Nebr., to Elm Creek, 
Nebr. 
Elm Creek, Nebr., to Wood River, 
Nebr. 
Valparaiso, Nebr., to Omaha, Nebr.., 
Cheyenne, Wyo. 
Pine Bluff, Wyo. 
Apr. 97 
...do_ 
...do- 
Apr. 98 
. .do_ 
Apr. 99 
...do_ 
. ..do_ 
...do_ 
Apr. 28 
...do_ 
,. .do_ 
...do_ 
...do_ 
May 9 
May 23 
..do. 
..do. 
.do. 
.do. 
.do. 
.do. 
•do. 
.do. 
..do- 
. .do. 
.do. 
• do. 
.do. 
July 13 
. .do_ 
..do_ 
July 14 
. .do. 
. .do..... 
July IS 
. .do. 
. .do. 
. .do. 
July 19 
. .do. 
Altitude (above ground). 
d 
a 
8 
"5 
Spores and pollen grains on 
slides. 
Stem rust, uredinio* 
spores. 
Eeaf rust,' uredinio* 
spores. 
Altemaria spores. 
Helminthosporium 
spores. 
Miscellaneous spores. 
Pollen grains. 
Total. 
Feet. 
Minutes. 
1,000 
*i 
5 
I 
38 
9 A 
3,000 
5 
.... 
8 
5 
. • . . 
3 
38 
34 
44 
3.000 
s 
13 
8 
A*T 
68 
4,000 
*2 
X 
29 
6 
30 
6s 
Control. 
500 to 
30 
I355 
I 
X 
3 
21 
381 
I, 500 
1,500 to 
30 
.... 
335 
3 
X 
23 
38 
400 
3.000 
I, soo to 
25 
. • . • 
X04 
9 
50 
X63 
3,000 
1, soo to 
25 
70 
8 
TAA 
222 
3,000 
10,000 to 
IS 
I 
I 
12.000 
12,000 to 
15 
X 
J 
14,000 
14,000 to 
xo 
0 
IS, 000 
15,000 to 
xo 
Q 
16,000 
16,000 to 
xo 
2 
2 
16, soo 
1,000 
20 
.... 
366 
5 
2 
17 
60 
450 
Control. 
XO 
0 
1,000 
2 
3 
23 
15 
2 
5 
48 
1,000 to 
XO 
28 
33 
13 
.... 
14 
5 
93 
2,000 
1,000 to 
30 
80 
86 
36 
X 
15 
• • • • 
21S 
2,000 
2,000 to 
20 
x6 
32 
X 
I 
as 
•. •» 
75 
2,500 
8,000 to 
s 
4 
36 
xo 
X 
9 
60 
9,000 
9,000 to 
5 
9 
19 
.... 
5 
33 
10,000 
10,000 to 
5 
.... 
4 
3 
.... 
12 
I 
20 
II. 000 
11,000 to 
5 
2 
7 
X 
xo 
12, 000 
Control. 
10 
Q 
1,000 to 
X 
4 
12 
3 
. . . . 
7 
.... 
26 
2,000 
3.000 
xo 
40 
30 
12 
•... 
15 
IS 
112 
3,000 
30 
80 
56 
35 . 
3 
25 
4 - 
203 
3,000 to 
10 
34 
35 
3 
10 
.... 
82 
6,000 
2,000 
25 
33 
14 
•ab 
12 
*n 
IS 
.... 
6,000 
4 
3 
34 
3 
14 
12 
70 
Ground. 
Over¬ 
2 
13 
10 
2 
7 
6 
40 
night. 
2, 500 
25 
19 
36 
23 
2 
9 
22 
III 
7,000 
25 
3 
2 
4 
.... 
3 
.... 
12 
8, 200 
30 
I 
s 
6 
2, 500 
20 
I 
I ■ 
19 
18 
I 
40 
2,000 
25 
126 
34 
ab 
‘38' 
ab 
68 
3,500 
25 
lOI 
28 
ab 
92 
ab 
17 
.... 
6, 000 
35 
15 
X 
n 
8 
n 
X 
6, 500 
5 
32 
17 
n 
4 
n 
12 
.... 
8,000 to 
15 
48 
25 
n 
4 
n 
x8 
.... 
9.500 
^ Puccinia triiicina and P. coronata, 
* Exposed by hand. 
3 ab=Abundant (over 200). 
< n=*Numerous (100 to 200), 
39364-23 - 5 
