f-Ixpefjment St.ilion 



.JLiHCOLN, NEBRASKA. 



METEOROLOGICAL * OBSERVATORY 



OF THE 



Hatch Experiment Station 



MASSACHUSETTS AGRICULTURAL COLLEGE 



Latitude, 42° 23' 48.5" N. Longitude 72° 31' 10" \V. 



Height of baro>iicter above ground^ 51 ft- Above sea level, 2yj.^ ft. 

 Height of Wifid Instruments 72 ft. 



BULLETIN No. 137. 



MAY, 1900. 



MONTHLY SUMMARY. 



Fressiire, In inches. 



Maximum reduced to treezint;, 30. oS, 29th, 7 A. 

 Minimum reduced to freezing, 29.09, 3d, 4 r. 

 Keducedt maximum reading, 30.3S, 29th, 7 a. 

 Reducedt minimum reading, 29.39, 3d, 4 p- 



Mean tri-daily reduced, 29.907 



Monthly range, . . . • 99 



*Air Teniperntnre. In Degrees Fahr. 



Highest 91-5, ijth, i p. 



Lowest 24.0, nth, 5 A. 



Mean liourly, 55-4 



Mean of means of max. and min., . . . .55.1 



Mean sensible (wet bulb), 50.2 



Monthly range 67-5 



Highest mean daily, 7S.1, 15th 



Lowest mean daily, 3S-S, loth 



Mean maximum, 6S.9 



Mean minimum, 41.4 



Mean daily range, 27.5 



Greatest daily range, 47.5, 27th 



Least daily range, 2.;, 19th 



Ifiiitiitliti/. 



Mean dew point 437 



Mean force of vapor, 497 



Mean relative humidity, . . . • ... • 63.S 



Precipitation. In inches. 



Total precipitation, . • 3.7N 



Numlx-r of days on which .01 inch or more 



rain or melted snow fell 



Snow total in inches, 



* Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



lyind. 



Total movement, 43Sim. 



Greatest daily movement, • . . . 260 m., 9th 



Least daily movement 32 m., 29th 



Mean daily movement i4i-3 ni. 



Mean hourly velocity, 5.9 m. 



Maximum pressure per square foot, 22 Ibs.^ 



66 ni. per hour, 5th, 12 m., N.W. 

 Prevailing Direction, W.N.W. 

 Summary. 



North, 19 per cent. 



.Southwest, 10 " " 



West 16 " " 



Northwest, 16 " " 



Other directions, 39 " " 



Went?ier. 



Mean cloudiness observed, . . . . 54 per cent. 



Total cloudiness recorded by the Sun 'iher- 



mometer, . ..... 21S hrs.=48 per cent. 



Number of clear days, S 



Number of fair days, 12 



Number of cloudy days, 11 



Ttright Siitishine. 



Number of hours recorded, . . . 235 hrs.=^?2lt 

 Rain, 3d, 4th, 5th, 6th, 8th, Qth, 15th, iSth, 



19th, 2ISt, 24th, 28th, 30th. 



Thunder and Tyightning, 3d, 8th, 9th, 15th, 



iSth, 24th. 

 Frosts, 6th, 7th, 10th, nth, 12th, 21st, 26th, 



27tli, 29th, 

 Gales, 35 miles or more per Hour, 52m., 1st, 



N.W.; 47m., 4th, N.W.; Wim., jth, 



N.W.; 37m., 6th, N.W.; 37m., 9th, N. 



W.: 47n")., 15th, W.N.W. ; 35m., iSth, S. 



W; 37ni., 21st, W.; 36m., 22d, W.N.W. ; 



34m.; 24th, N.N.F.. 



