BULLETIN No. 234. 



JUNE. 1908. 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGllICULTURAL EXPERIMENT 



STATION. 



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



ffeighi of barometer above ground, ^i ft. Above sea level., 2"^^.^ ft. 

 Height of Wind Instruments J2 ft. 



MONTHLY SUMMARY. 



HreH.Hure. In inches. 



Ma.Kiinuin reduced to freezing, 30.11,6th, Sa' 

 Mininiuni reduced to freezing, 29.47, 9th, 5 P.; 



loth, 12 M. 

 Ueducedl nia.xinium reading, 30.40, 6th, 8 A. 

 Keducedt niininuim reading, 29.75, 9tli. 5 P-; 



10th, 12 M. 



Mean semi-daily reduced 3o-029 



Montiily range 0.65 



*.■£»»• Tettipevatiire. In Degrees Fahr. 



Higliest 91.5,24th, 2:30 P. 



Lowest 36.0, 3d, 6 A. 



Mean hourly, 67-6 



Mean of means of max. and niin 67.2 



Mean sensible (wet bulb), 60.7 



Montiily range 55-5 



Highest mean daily, 76.5,20th 



Lowest mean daily 57-7, 3d 



Mean maximum 81. i 



Mean minimum, 53-3 



Mean daily range 27.8 



Greatest daily range, 38-Oi 7tli 



Least daily range, i7-0, 29th 



Hntnidity. 



Mean dew point 56.2 



Mean force of vapor, 672 



.Mean relative humidity, 66.2 



Freclpifation. In inches. 



Total precipitation, 0.76 



Number of days on which .01 inch or more 

 rain or melted snow fell, 4 



• Temperature in ground shelter, 

 t Keduced to freezing and sea-level. 



}yind. 



Total movement, 457im. 



Greatest daily movement, .... 295m., 15th. 



Least daily movement 50m., 13th. 



Mean daily movement 152 m. 



Mean hourly velocity, 6.3 ni. 



Maximum pressure per square foot, 7.0 lbs.= 



37 m. per hour, 2d, i P., W.N.W. 

 Maximum velocity for 5 minutes, 24 m. per 



hour 9th, 6 p., S. 

 Prevailing Direction, Southwest. 



Summary. 



Southwest 10 per cent 



West Southwest 10 " " 



Northwest, 10 " '' 



South Southeast, 10 " " 



South, 23 " " 



Other directions, 37 " " 



Weather. 

 Mean cloudiness observed, .... 28 per cent. 

 Total cloudiness recorded by the Sun 'i'lier- 

 mometer, . . . 95lirs.=2i percent. 



Number of clear days, 22 



Number of fair days, 6 



Number of cloudy days 2 



Bright Sunshiue. 



Number of hours recorded, . . 362 lirs. = 79< 

 Rain, ist, 15th, i6th, 24th, 29th. 

 Thunder and Liightning—joth, 24th, 28th. 

 Very JJght Frost, 3d. 



Onles, 35 miles or more per hour., 37 m. 

 2d, W. N. W. 



