CEREAL INVESTIGATIONS AT THE NEPHI SUBSTATION. 9 
- 
TABLE III.— Average daily and total monthly evaporation (inches) at the Nephi sub- 
station during each of the six summer months for five years, 1908 to 1912. 
y Six 
Year. Apr. May. June. July. Aug. Sept. mentee 
Average daily evaporation: i ; 
OQ SHS Saree bistrine soot sete cic *0. 16 * 0. 23 0. 26 0. 34 0. 30 0. 21 0.25 
TOO as TS ee aie 12 19 . 29 31 23 19 2 
OU Niecy ona eraeS Ie in Sk 19 24 . 36 32 32 20 27 
TST Kt eas a a Ok i Mia 16 27 29 28 34 22 26 
IO tas a Ne ree eee a ek ee eae 12 20 31 30 27 21 24 
INV ETASC He ane Lo 15 23 . 30 31 . 29 Spal 25 
Total monthly evaporation: 
OO Searels rey * 4, 80 * 6.98 7.87 10. 52 9. 34 6: 23 45.74 
UD) eee eas Stevan pees. CMs jae Ko 3. 64 5. 99 8.81 9. 47 7.03 5. 59 40. 53 
HOI FERRE eer yaa Wo SA et 5. 82 7.46 10. 90 9. 98 10. 09 6.01 50. 26 
TOMI Ges SRS Bie AIG oi ean ome 4.93 8.41 8. 69 8.72 10. 47 6. 69 47.91 
INGA ee eS tere Soest See a ean 3. 54 6. 30 9. 28 9. 24 8. 89 6. 16 43. 41 
PASV. CTA CRI ele ree arses as A 4.55 7.03 9.11 9. 59 9.16 6. 14 45. 57 
* The evaporation tank was not installed until June, 1908; hence, the evaporation for April and May, 
1908, has been interpolated. 
The lowest total evaporation, 40.53 inches, was recorded in 1909. 
The highest, 50.26 inches, was recorded in 1910. The high evapora- 
tion of 1910, coupled with the scarcity of rainfall, made that year a 
severe one in dry-land crop production. The lowest average daily 
evaporation has been recorded in April and the highest in July; how- 
ever, there is little difference in the evaporations of June, July, and 
August. ; : 
WIND. 
The anemometer used at the Nephi substation was not obtained 
until the spring of 1909, and for this reason a record of the wind for 
1908 is not available. Since 1909 a complete record of the wind dur- 
ing April to October, inclusive, has been kept. The anemometer has 
stood next to the evaporation tank and has recorded the wind which 
has passed directly over the tank at a distance of about 2 feet from 
the surface of the ground. The average wind velocity Gn miles per 
hour) during the months from April to October, inclusive, for the years 
1909 to 1912, inclusive, is presented in Table IV. 
TaBLE LV.—Average wind velocity (miles per hour) at the Nephi substation by months 
for the period from April to October for the years 1909 to 1912. 
Year. Apr. May. June. July. Aug. Sept. Oct. Average. 
SOO Ree ake Sane: 4.7 4.6 4.1 4.1 Bhi Sal 3.6 4.0 
TUS SO SoA es a ea 5.3 4.6 524 4.4 4.4 3.9 3.2 4.5 
TAGES ip a 4.3 6.0 4.9 BY 7 4.4 4.6 3.4 4.5 
TS ee eM oleae gee 4.4 552 4.8 4.3 3.9 Anal By yA 4.3 
Average.......- 4.7 i Al 4.8 4.1 4.0 4.1 B83 4.3 
Table LV shows that the average wind velocity per hour at Nephi is 
comparatively low, and that there is little difference among the 
9679°—Bull. 30—13——2 : ) 
