6 BULLETIN 1387, U. S. DEPARTMENT OF AGRICULTURE 
Table 4. — Monthly wind velocity at the Biggs Rice Field Station from April 1 to 
October 31 for each year during the 12-year period from 1913 to 1924, inclusive 
[Data in miles per hour] 
Year 
April 
May 
June 
uly 
gust 
Septem- 
ber 
October 
Maximum: 
1913- 
14.0 
7.5 
9.6 
7.1 
13.7 
13.2 
12.6 
1914 
7.1 
11.0 
12.0 
8.7 
1915 
12.1 
12.4 
12.8 
11.3 
11.7 
9.7 
7.2 
8.1 
3.5 
8.7 
6.7 
6.9 
8.2 
1916 ,.. 
9.7 
1917 
10.6 
8.6 
9.4 
5.9 
4.0 
9.0 
7.9 
1918 
15.7 
8.5 
5.8 
9.5 
5.9 
4.9 
5.3 
191-1 
8.4 
12.1 
7.4 
6.0 
5.8 
6.8 
6.9 
1920... 
16.1 
8.7 
8.7 
7.9 
5.8 
5.6 
5.7 
1921 
10.7 
9.6 
8.5 
13.7 
5.9 
6.8 
6.0 
1922 
10.9 
10.1 
7.0 
4.0 
4.4 
4.0 
6.3 
1923 
11.0 
9.4 
7.7 
6.6 
7.3 
5.4 
6.3 
1924 
10.2 
9.8 
7.5 
5.8 
7.9 
9.3 
7.5 
Minimum: 
1913 .. 
1.1 
.4 
1.3 
.8 
1.0 
1.0 
.6 
1.5 
.6 
.3 
1914 
.6 
1.4 
.4 
1.8 
.1 
.1 
.3 
1915 
.9 
191(1 
1.2 
1.4 
1.7 
1.4 
.9 
.2 
1917 
1.3 
1.8 
.2 
.2 
.9 
1.1 
.6 
1918 
1.3 
2.0 
.6 
.7 
.4 
.2 
.1 
1919 
.9 
.9 
.4 
.9 
.5 
.4 
.2 
.3 
1920 
1.0 
.1 
1921 
.9 
1.0 
.0 
1.0 
.8 
.7 
.3 
1H22 
1.2 
.8 
.n 
.3 
•4 
•1 
.1 
1923 
.9 
.9 
1.0 
.7 
L0 
.6 
1.2 
.6 
.6 
.5 
.4 
.1 
1924 
.6 
Average: 
1913 
5.1 
4.2 
4.2 
3.2 
3.9 
4.9 
4.1 
1914 
3.5 
3.8 
5. 2 
3.5 
1915 
4.9 
5.3 
4.3 
3.2 
2.1 
2.2 
2.3 
1916 
4 S 
5.0 
4.2 
3.6 
3.2 
3.0 
2.2 
1917 
5.2 
4.5 
4.1 
2.4 
2.3 
4.0 
2.7 
1918..- 
1. 1 
3.9 
2.2 
3.1 
2.3 
1.7 
1.7 
1919- .-- 
3.2 
_'. :> 
3.9 
3.2 
2.5 
2.8 
3.2 
1920.... 
4.2 
3.2 
4.3 
3.2 
1.7 
2.0 
2.0 
1921 
3.9 
3.6 
3.4 
3.0 
2.4 
2.4 
1.6 
1922 
4. 9 
3.8 
3.1 
1.8 
1.8 
.9 
1.6 
1923 
4.2 
3.6 
3.7 
2.7 
2.2 
1.9 
2.4 
1924 
4.1 
3.8 
4.3 
3.1 
2.4 
2.4 
2.7 
EVAPORATION 
Table 5 presents data on the monthly, average monthly, seasonal, 
and average seasonal evaporation from April 1 to October 31 for 
the 12-year period from 1913 to 1924, inclusive. 
Table 5. — Monthly and .seasonal evaporation at the Biggs Rice Field Station from 
April 1 to October SI during the I? -year period from 1913 to 1924, inclusive 
[Data in inches] 
Month 
1913 
April 
May 
June. 9.120 
July. 11.210 
August 9.247 
September .| 8 : i 
1914 
1915 
1916 ! 1917 1918 
1919 
L920 
1921 
3.840 3.383 4.091. 4.303 5.243 
5. 789 4. 998 7. 161 6. 119 '0. 970 *3. 845 5. 853 
7.348 8.500 9.26] 9.44812.224 8.991 7.100 
8.263|9.618 9.270 10.110 8.679 9.692 7.101 
6.775 7.825 8.152 8.178 7.035 7.858 6.227 
5.760 5.912 6.279 6.158 3. '.M0 5.497 4.091 
7.052 
9. 070 
1922 
1923 
1924 
A ver- 
age 
October. 
.221 3.003 4.466 2.713 
Total: 
June to Octo- 
ber 14. 571 31. 149 36. 321 
May to Octo- 
ber 30.938 41.317 
April to Octo- 
ber 40. 77S 11. 700 
480 L256 2.793 
4. 947 4. 425 5. 205 
5.945 0.707 7.431 
0.813 7.227*7.149 8.455 
0.932 8.860 8.400 8.936 
7.845 0.495 7.275 6.435 7.446 
1.324 5. 672 « 4. 593; 5.656 
2.879 2 542 3.870 J 
35.675 30.364 30.291 
42.830' 
27.975 31.808 27.136 32.910 
37.60133.08139.617 
42.904 38.028 14.012 
.34.020 
. 38. 575 
. 42. 090 
1 Last 17 days of May. 
2 Last 18 days of May. 
3 26 days in June. 
* 23 days in September. 
