Mar. 15, 195 Dissemination of Chestnut-Blight Fungus 501 
TasiE II.—Detailed record of all ex: ere 
posure plates in which . ad 
were caught at West Chastet, Pa., in pie 5 ne ne oe pete parasitica 
. Horizontal | Number of 
pte Date of exposure. Rainfall. ice ocien Length of prlerie E mlstinn 
of rain, Sepoeure: blight | parasitica 
lesion. caught. 
Inches. D. te we. Minutes. Feet. 
0.095 | 4 0 ° Io G2 I 
-095|}4 9 o 10% a2 br 
. 26 I 51 93% 15% II 
26 I 54 Io 16 16 
. 26 2 ° Io 4% 9 
- 26 2 19 13 Ir 4 
. 26 2 35 II 7 5 
. 26 2 48 IL 1534 2 
. 26 2 54 12 14% 2 
. 26 3. «25 II 1534 2 
. 26 3. 34 II 74 I 
. 26 3. «58 104 16 I 
. 26 9 14 1344 ay I 
. 26 II 19 Il a2 I 
. 68 I 23 114 4% 2 
. 68 2 7 124% 27 I 
- 68 6 4 11% a2 I 
- 68 7 8 1234 ag I 
. 68 ro 5 10% a5 I 
. 68 12 7 13% 27 I 
09 I 55 I 217 ro 
+09 2 ° 13 195 7 
+ 09 2 I 14 IIo 4 
+ 09 2 8 1234 27 22 
. 09 2 19 124 85 II 
. 09 2 23 15 180 7 
- 09 2 25 15 237 Io 
- 09 2 45 1334 7 6 
09 3 «I2 11% II 7 
+09 3. (37 13 rt 3 
. 09 3 45 1034 86 7 
09 4 29 10 4% I 
. 09 5 14 1344 5 I 
©. 35 ° 14% 19 ‘ 
38 5 1034 174% 20 
rs: 15 20 174 62 
08 17 I pe) 24 
. 08 44 1344 174 79 
. 08 56 1574 14 r 
.08 I I 12 7 2 
©.07 20 144 19 20 
-73 6 ° 16 77 z 
+73 6 30 15 1% : 
a@Stumps more or less overhung by diseased sprouts. % From fragments of bark. ¢ Approximately. 
To supplement the tables, it may be well to give in chronological order 
a more detailed record of the actual routine pursued. 
A rain occurred the night previous to August 19, and examination of 
the ascospore traps (see ““Ascospore-trap tests”) showed that abundant 
expulsion of ascospores had occurred. But when the first plates were 
exposed too long a time had evidently intervened since the rain, as no 
positive results were obtained, except that one colony of Endothia para- 
sitica developed in a plate exposed in the early afternoon. 
