BULLETIN No. 282. 



JUNE, 1912 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTIIIUL EXPERIMENT 



STATION. 



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



Height of barometer above ground, ^i ft. Above sea level., 2jj.^ ft. 

 Height of Wind Instrut/ients 72 ft. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximum reduced to freezing, 3ooi,:oth, 8 a. 

 Minimum reduced to freezing, 29.38, 12th, 8 p. 

 Keducedt maximum reading, 30.31, loth, 8 a. 

 Keducedt minimum reading, 29.67, I2tii, S P. 



Mean semi-daily reduced, 29.993 



Montiily range 0.64 



*Air Temperature. In Degrees Falir. 



Higliest, 91-0, 29th, I p 



Lowest 36.0,8th, 5A.; loth. 5 a 



Mean hourly, 65.0 



Mean of means of max. and min 64.9 



Mean sensil)le (wet Ijulb), 59° 



Montiily range, 55-° 



Highest mean daily, 766, 29th 



Lowest mean daily, 54-3< Sth 



.Mean maximum, 78-4 



Mean minimum 5i-3 



.Mean daily range 27.1 



Greatest daily range 39-°. lot'i 



Least daily range, 10.;. i6th 



Humidity. 



Mean dew pjint, 54-5 



Mean force of vapor 631 



Mean relative humidity, 700 



Precipitation. In inches. 



Total precipitation, 0.77 



Number of days on which .01 inch or more 

 rain fell. ■ 7 



•Temperature in ground shelter. 

 t Keduced to freezing and sea-level. 



Wind. 



Total movement, 45331^. 



Greatest daily movement, .... 292111., 30th 



Least daily movement, 57ni., 19th 



Mean daily movement 151m 



Mean hourly velocity, 6.3 m 



Maximum pressure per square foot, 8.5 lbs.= 



41m. per hour, 13th, 6 P., N. 

 Maximum velocity for 5 minutes, 24 m. per 



hour, 13th, 6p., N. 

 Prevailing Direction, West. 



Summary. 



Northwest 27 per cent. 



South Southwest 13" 



Southwest to " 



West Northwest 10 " " 



South 10 " " 



Other directions 3° " 



Weather. 



.Mean cloudiness observed, .... 43 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, .... I43hrs.=3i per cent. 



Number of clear days 3 



Number of fair days, 23 



Number of cloudy days, 4 



Bright Sunshine. 



Number of hours recorded, . . 314 hrs.=69# 

 Rain, ist, 2d, 3d, 4th, 6th, i6th, 20th, 21st, 

 22d, 25th. 



rliuii<l«a- and Liglitning, 4th, 6th. 

 Frost on low ground, Sth, loth. 

 Gales, 35 or more miles per hour : 41m, 13th, 

 N. 



