754 



EXPERIMENT STATION RECORD. 



" In common with the arid region in general, Arizona usually experiences a large 

 daily range of temperature, [but this also] is mitigated to a great extent by the 

 prevalent low degree of humidity." 



The percentage of sunshine (77) was higher at Tucson in 1893 than at 

 any of the 24 stations reporting that element in that year. 



Meteorological observations, W. S. Sweetser {Pennsylvania ^ta. 

 Ept. 1895, p2^. 2G8-272, 288-325). — The meteorological work of the sta- 

 tion in 1895 was " merely a continuation of the work of preceding years, 

 including the observations usually called for by the United States 

 Weather Bureau, upon atmospheric conditions, and also observations 

 upon soil temperature at various depths, and upon the daily duration 

 of sunshine." (E. S. K., C, p. 701.) Monthly summaries of observa- 

 tions are given in the body of the report, and the detailed record in an 

 appendix. The annual summary is us follows : ' 



Summary of meieorological ohservations, 1S95. 



Barometer (inches) : 



Meau ■ 



Highest 



Lowest 



Temperature (° F.): 



Mean 



Highest 



Lowest 



Mean daily range 



Greatest 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 or more. 



Average hours of sunshine per day 



Wind (miles) : 



Total movement 



Maximum velocity 



Greatest daily movement 



Last frost in spring 



First Irost in fall 



Tear 1895. 



30.306 



30.796 (Feb. 24). 

 29.459 (Jan. 29). 



50.6 



96 (July 19) , 

 — 4 (Dec. 4) , 

 18.3 



36 (Feb. 17, Sept. 2). 

 3 (Apr. 11, Dee. 1).. 

 79.9 



53.. 

 150. 



30.281 



35 (Feb. 11, Dec. 13) 

 492 (Feb. 22) 



Growing season 



(Apr. to Sept., 



1895). 



47.G. 



90 (July 19) 



18 (Apr. o). 



20.2. 



30 (Sept. 2). 



7G.5. 



42.1 28.01. 



9.5 



2.8 2.79 (May 20). 



125 73. 



74. 



5 h. 37 m. 



May 29. 

 Sept. 26. 



Principal periods of crop development. 



Wheat : 



Seeded, September 4-14, 1894. 



In bloom. May 31. 



Ripening, June 14-18. 



Cut, July 1-5. 

 Oats: 



Seeded, April 10-19. 



Ripening, July 12-17. 



Cut, August 5-9. 

 Corn: 



Planted, May 2-10. 



Cut, September 13-25. 



Corn — Continued. 



Husking begun, October 1. 

 Potatoes : 



Planteil, April 25-May 3. 



Harvested, September 6-13. 

 Grass : 



In bloom, June 13. 



Cut, June 18-28. 

 Clover : 



Cut, June 14-16. 



Second crop in blooiu, August 2. 



