36 
THE DISPERSION OF THE GIPSY MOTH. 
Table IV. — Temperature and direction and velocity of 
wind, etc. — Continued. 
HLififc 
E I-5Y. 
NW 
If. if. 
Fig. 3. — Diagram show- 
ing the proportion of 
time the wind blew in 
each direction, when 
wind spread was pos- 
sible, during April and 
May for 10 years. 
1902-1911. Records 
from Boston office of 
Weather Bureau. (Orig- 
inal.) 
Date. 
1911. 
May 
24 hours. 
12 m. to 6 p. m 
8 a. m. to 12 m 
2to3p. m 
12 m. to 6 p. m 
9 a. m. to 4 p. m 
12 m. to 8 p. m 
I to 2 p. m 
7 a. m. to 4 p. m 
9 a. m. to 12 p. m 
12 p. m. to 8 p. m 
9 a. m. to 7 p. m 
10 a. m. to 6 p. m 
9 a. m. to 1 p. m 
5 to 7 p. m 
8 to 11 a. m., 4 to 5 p. m. . . 
12 m. to 12 p. m 
12 p. m. to 3 a. in., 5 to 7 
a. m., 10 p. m. to 12 p. m. 
12 p. m. to 1 a. m 
II a.m. to 12p.m 
5 a. m. to 12 p. m 
4 to 5 a. m 
Temper- Direction Velocity 
ature. of wind. of wind. 
°F. 
66 to 72 
65 to 68 
65 
65 to 68 
78 to 81 
66 to 81 
70 
67 to 78 
69 to S4- 
67 to 81 
66 to 80 
65 to 73 
69 to 75 
66 to 71 
69 to 82 
70 to 87 
69 to 79 
65 to 86 
67 to 88 
68 
SW. 
W 
SW 
SE 
W., NW... 
s w 
s w 
NW 
SW 
SW 
W..NW... 
SW 
NW 
SE.,SW.. 
W. 
SW 
SW 
NE. 
SW. 
s w. 
N... 
Miles 
per hour. H 
11 to IS. 
14 to IS. 
10. 
11 to 17. 
10 to 14- 
10 to 17. 
18. t 
11 to 25. 
11 to 25. 
10 to 19. 1 
13 to IS. 
10 to 19. < 
10 to 15. 
10 to 14. 
10. 
11 to 14. 
10 to 11. 
10. 
10 to 14. 
10 to 19. 
10. ) 
During the entire period covered by these 
records 51 per cent of the days when spread was 
possible the wind was southwest. Figure 3 
shows graphically the proportion of the time 
when the wind blew in each direction, as given 
in the above tables. 
In the fall of 1907 the gipsy moth was found 
extensively in Xew Hampshire, especially in the 
eastern part, and as a small strip along the 
seacoast in Maine was also infested. Weather 
Bureau records are here added, which have been 
secured from the Concord. X. H., and Portland. { 
Me., stations. 
Table V. — Temperature, direction, and velocity of wind 
on dates after hatching of caterpillars. 1907-1911. 
CONCORD, N. H. 
Date. 
Hours 7 a. m. to 7 p. m. 
190' 
Apr. 
May 
12 to 4. 
2 to 5 . . 
8 to 7.. 
9 to 7.. 
7 to 9.. 
12 to 5. 
1908 
Apr. 23 12 to 3. 5 to 6. 
25 I 11 to 7. 
26 9 to 5.. 
27 10 to 5. 
Maximum 
tempera- 
ture. 
Direction 
of wind. 
Velocity 
of wind. 
Miles per 
, hour. 
65 SW..SE.. 10 to 13 
66 I S 10 to 11 
74\8W.,S....\ 12 to 20,) 
66 XW 10 to 16 
79 j SW 11 to 16 
81 J SE 70 to 14 | 
79 XW 10 to 14 v f 
68 : SE 10 to 13 
SO SW.. W... 10 to 19 i 
78,1 SE 11 to 14 I 
