210 



EXPERIMENT STATION RECORD, 



ness, and direction of tlie wind. The average temperature for the year was 

 49.5° F., the highest temperature 98°, July 0, tlie lowest 7°, December 24. The 

 total precipitation was 5.09 in., being 2.51 in. less than the normal for 17 years. 

 There were 222 clear days during the year. There was an average daily range 

 in temperature of 29°, the greatest variation being during the cloudless months 

 of July and August, when the daily range was 36°, and least in January and 

 February, when the average daily variation was 23°. 



This great daily range of temperature is an important and characteristic fea- 

 ture of the climate of this region. " In the spring it endangers the fruit crop, 

 for warm, sunny days are followed by nights cloudless and cold, when the frost 

 plays havoc with bud and blossom. ... [It] certainly has its bad influences on 

 agriculture in this vicinity, but it is equally certain that it forms in other ways 

 one of the most pleasant and beneficial features of our climate." 



Annual precipitation in Oklahoma and Indian Territory, J. P. Slaughter 

 {Oklahoma Sta. Rpt. 1906, pp. 51, 58). — Tabular summaries are given of annual 

 precipitation at various places in Oklahoma and Indian Territory during the 

 period 1SS9 to 190.". 



Meteorology, T. M. Carpenter and N. C. Hamner {Pennsylvania 8ta. Rpt. 

 1905, pp. 60-70, 213-23Ji). — The observations here recorded are of the same 

 character as those reiwrted in previous years (E. S. R., 17, p. 222). Monthly 

 summaries of observations are given in the body of the report and the detailed 

 record in an appendix. The summary for 1904 is as follows : 



Summary of meteorological observations, 190-i. 



Growing season 

 (Apr.-Sept.). 



Barometer (inches): 



Mean 



Highest 



Lowest 



Temperature (°F.): 



Mean 



Highest 



Lowest 



Mean daily range 



Grcali'st daily range 



Least daily range 



Mean daily relative humidity (percent) 



Rainfall (inches): 



Total 



Greatest monthly 



Greatest daily 



Number of days on which 0.01 in. or more of rain fell 



Mean percentage of cloudiness 



Number of days on which cloudiness averaged 80 percent i 

 or more. 



Average hours of sunshine per day I 



Last frost in spring ' 



First frost in fall ' 



30.086 



30.779 (Mar. 7). 

 29.305 (Mar. 8). 



4.0.7 



89 (.Inly 18).... 

 — 15 (Jan. 5).. . 



17.5 



43 (May 12).... 

 1 (Jan. 27) 



36.03 , 



6.30 (July)... 

 1.79 (July 10) , 



1.50 



51.3 



122 



61.1. 



89 (July 18). 



19 (Apr. 14). 



18.8. 



43 (May 12). 



80.3. 



21.61. 



1.79 (July 10). 



81. 



48.3. 



51. 



5 h. 50 min. 

 May 12. 

 Sept. 16. 



Meteorological conditions in Denmark, 1904-5, V. Willattme-Jantzen 

 {Tidsskr. LandiJkonom., 1905, No. 10, pp. 517-532). 



Extension of the river and flood service of the Weather Bureau, H. C. 

 Frankexfield (f. S. Dcpt. .\<ir. Yearbook 1905, pp. 231-2 'lO, pi. 1). — The early 

 history, recent extension, and present status of this service is fully explained. 

 Beginning with the year 1904 there has been rapid extension of the service, 

 so that at the end of 1905 thei-e were 420 river stations and 120 rainfall sta- 

 tions, covering all of the principal watersheds of the United States and making 

 adequate provision for the present needs of the service. 



The following lines along which further im[)rovement and extension may be 

 made are discussed in detail: "(1) Geology and topography of the water- 



