72 
Journal of Agricultural Research 
Vol. II, No. i 
Table II. —Longevity tests of pycnospores in soil stored in culture room in jpij—Contd. 
Series G. 
[Rainfall: Date, May 16 and 17; amount, 0.74 inches. Date of collection of soil samples. May 19. Source 
of soil samples: Orchard of grafted Paragon trees, Martic Forge, Pa. 1 No. 17. Base of tree bearing as co¬ 
spore trap No. 44. No. 18. Base of tree bearing ascospore trap No. 43. No. 19. Base of tree bearing 
ascospore trap No. 43.] 
Number of 
days of drying. 
Number of viable spores per gram of soil. 
Date of test. 
Soil sample 
No. 17. 
Soil sample 
No. 18. 
Soil sample 
No. 19. 
May 20. 
0 
4,106, 666 
1, 196, OOO 
8, 890, 000 
May 27. 
7 
3,808, OOO 
2, 318, 666 
925,000 
1, 840, OOO 
June 4. 
15 
630, OOO 
4,966, OOO 
June 12. 
2 3 
I > 35 I i 2 5 ° 
530,000 
4,156, 666 
June 19. 
30 
816,OOO 
94, 285 
3,192,000 
June 27. 
38 
920, OOO 
468, OOO 
116, OOO 
(?) 
2, 240, OOO 
I,662,727 
July 3. 
44 
July 11 . 
S 2 
733,333 
30, OOO 
972.571 
July 20. 
61 
204, 545 
0 
90, OOO 
July 3°. 
71 
68,148 
46, OOO 
59 .259 
Aug. 8. 
80 
0 
0 
0 
Aug. 26 . 
98 
0 
0 
5,000 
Sept. 25. 
128 
0 
0 
0 
1 Collected by Mr. C. E. Taylor, formerly in the employ of the Pennsylvania Chestnut Tree Blight Com¬ 
mission. 
Series H. 
[Rainfall: Date, May 16 and 17; amount, o.6r inch. Date of collection of soil samples, May 19. Source 
of soil samples: No. 20. Base of tree bearing pycnospore trap No, III. No. ai. Base of tree bearing pyc- 
nospore trap No. VI.] 
Date of test. 
Number of 
days of drying. 
Number of viable spores per 
gram of soil. 
Soil sample 
No. 20. 
Soil sample 
No. 21. 
May 21 . 
0 
2,832,000 
2,640, OOO 
May 27. 
6 
750,000 
1,063,333 
June 4. 
14 
364, 000 
571,428 
June 12. 
22 
100, 800 
294,853 
June 19. 
29 
26, 666 
150,857 
June 27. 
37 
170,500 
115,142 
July 3. 
43 
68,181 
140,^000 
July 11 . 
5 i 
21,714 
82, OOO 
July 20. 
60 
15,000 
21, 176 
July 3 °. 
70 
177 , 777 
25,925 
Aug. 8. 
79 
12,413 
0 
Aug. 28. 
97 
0 
0 
Sept. 25. 
127 
0 
0 
