32 
THE DISPERSION/ OF THE GIPSY MOTH. 
was highest, during the years 1902 to 1911. Table III shows the 
wind direction during the same number of days for the lowest of the 
maximum temperatures. 
Table II. — Direction of wind during 20 days of highest temperature in April 
and May, 1902-1911. (From records of the United States Weather Bureau 
at Boston, Mass.) 
Date. 
Temper- 
ature. 
Direction 
of wind. 
Date. 
Temper- Direction 
ature. of wind. 
Apr. 22, 1908 
85 
84 
83 
83 
83 
80 
79 
79 
78 
76 
75 
75 
74 
73 
73 
72 
72 
72 
SW. 
SW. 
W., NW. 
8. 
SW. 
W. 
W. 
NW., SE. 
SW. 
sw. 
s.,w. 
sw. 
w. 
sw. 
NW. 
sw. 
w. 
w. 
May 22, 1911 
°F. 
92 ' W 
Apr. 26, 1908 
Mav 23, 1902 
88 SW 
Apr. 29, 1903 
May 18, 1903 . 
88 W 
Apr. 30, 1903 
May 19, 1903 
88 SW. 
Apr. 19, 1909 
May 27, 190S 
88 sw 
Apr. 27, 1911 
May29,1911 
May 26, 1904 
88 
87 
87 
87 
86 
86 
86 
86 
SW 
Apr. 28, 1911 
sw. 
Apr. 29, 1911 
May 26, 1908 
sw 
Apr. 6, 1910 
Mav 21. 1911 
sw 
Apr. 7. 1909 
May 19. 1906 
w 
Apr. 29, 1902 
Mav 31. 190S 
sw. 
Apr. 30,1911 
Mav 24, 1910 
sw. 
Apr. 26, 1905 
Mav 28, 1911 
sw 
Apr. 30, 1907 
Mav 24, 1904 
85 SW. 
Apr. 15, 1910 
Mav 11, 1911 
85 
84 
Si 
84 
84 
S4 
sw. 
Apr. 21, 1905 
Mav 24, 190° 
sw. 
Apr. 30, 1905 
Apr. 6, 1911 
Mav 17, 1903 
sw. 
Mav 21, 1903 
SW NW. 
Apr. 23, 1902 
71 E., SW. 
Mav 22. 1903 
NW. 
Apr. 28, 1902 
71 W. 
Mav 12, 1908 
sw. 
Table III. — Direction of wind during 20 days of lowest temperature in April 
and May, 1902-1911. (From records of the United States Weather Bureau 
at Boston, Mass.) 
Date. 
Temper- 
ature. 
Direction 
of wind. 
Date. 
Temper- 
ature. 
Direction 
of wind. 
Apr. 4,1908 
°F. 
35 
35 
36 
37 
38 
38 
38 
39 
39 
39 
39 
39 
40 
40 
40 
40 
40 
40 
41 
41 
NW. 
W. 
E. 
NW. 
N., W. 
N. 
E. 
N. 
W. 
W..NW. 
SE. 
NE. 
NE. 
NW. 
N. 
NE. 
W. 
N. 
N. 
SE. 
May 2.1903 
°F. 
44 
44 
E., SE. 
Apr. 2,1911 
Mav 3! 1907 
E. 
Apr. 7, 1907 
Mav 1, 1909 
Mav 7. 1908 
45 1 NE. 
Apr. 5, 1903 
46 
47 
47 
47 
E. 
Apr. 20, 1904 
Mav 3, 1903 
E. 
Apr. 2,1906 
Mav 17, 1905 
NE. 
Apr. 8,1907 
May 22, 1909 
NE. 
Apr. 9, 1907 
Mav 5, 1910 
47 N. 
Apr. 10. 1910 
May 3, 1911 
47 W. 
Apr. 3, 1908 
Mav 28, 1906 
48 J NE. 
Apr. 4,1911 
Mav 2, 1907 
49 NE. 
Apr. 23, 1911 
May 4, 1907 
49 SE. 
Apr. 16, 1903 
Mav 7. 1907 
49 1 E. 
Apr. 16, 1904 
May 27, 1907 
49 E. 
Apr. 2,1907... 
Mav 8, 1908 
49 NE. 
Apr. 30, 1909. . . 
Mav 4,1910 
49 NE. 
Apr. 1,1911 
Mav 3, 1902 
50 
50 
50 
NE. 
Apr. 9, 1911 . 
Mav 15. 1904 
NE. 
Apr. 10, 1902... 
Mav 16, 1905 
N., NE. 
Apr. 9, 1906 
Mav 11. 1906 
50 
W. 
A glance at these tables indicates that in April, when the tempera- 
ture ranged above 70°. 16 days out of 20 the wind varied between 
south and west. For the same month during the low temperatures 
the wind ranged between north and east for 10 days out of the 20. 
Corresponding figures during May show that for 18 days out of 20 
the wind was from the south and west, and for 16 days out. of 20 
