BULLETIN No. 255. 



MARCH, I9IO 



Meteorological Observations 



AT THK 



MASSACHUSETTS 



AGRICULTURAL EXPERIMENT 



STATION . 



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



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

 Height of IVind Instruments 72 ft. 



MONTHLY SUMMARY. 



I'regsure. In inclies. 



Maxiiniini leduced to freezing, 30 19. igtli, 8 A. 

 Mininuini reduced to freezing, 29,08, 14th, 4 A. 

 Reduced! maximum reading, 30.50, 19th, 8 a. 

 Keducedt minimum reading, . 29.39, i4tli, 4 A. 



Mean semi-daily reduced, 3o-076 



Montiily range, i-ii 



*Air Veinperatnre. In Degrees Fahr. 



Highest, 78.0, 29th, 3:30 r. 



Lowest, 12.5, ]Slli,6;3o A. 



Mean liourly, 39.i 



Mean of means of max. and min 40.2 



Mean sensible (wet bulb), 34-i 



Montiily range, 65-5 



Highest mean daily, 57.8,25th 



Lowest mean daily 26.9, iSth 



Mean maximum, 5i-5 



Mean minimum, 28.S 



Mean daily range 22.7 



Greatest daily range, 42.0, 29th 



Least daily range, 6.5, ist 



Huiniditj/. 



Mean dew point 28.8 



Maan force of vapor, • .234 



Mean relative humidity, 728 



Precipitation. In inches. 



Total precipitation, i-37 



Number of days on which .01 inch or more 



rain or melted snow fell -8 



Total snow in inches trace 



* Temperature in ground shelter, 

 t Reduced to freezing and sea-)evel. 



Wind. 



Total movement, 5579'ii. 



Greatest daily movement, .... 349m., aSth 



Least daily movement, 64ni., 2d. 



Mean daily movement, i8om. 



Mean hourly velocity, 7.5 m. 



Maximum pressure per square foot, 11. 5 lbs.= 



48ni. per hour, 25th, 2 P., W.S.W. 

 Maximum velocity for 5 minutes, 36m. per 



hour 25th, 2P., W.S.W. 

 Prevailing Direction, West Northwest. 

 Sumniary. 



Northwest 13 percent. 



North Northwest 13 " " 



West Northwest 10 " " 



South Southwest 10 " " 



South 10 " " 



Other directions, 44 " " 



Weathef. 

 Mean cloudiness observed, . • . .49 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 961irs.=26 per cent. 



Number of clear days ig 



Number of fair days, 9 



Number of cloudy days, 3 



liriffht Siiiiskine. 



Number of hours recorded, . . 275 hrs. = 7454 



Kain, TSt,2d,6th, 7th, 13th, 14th, 2otli, 31st. 



Snovi-, 7th, 13th, 14th. 



Hail, 13th, 14th. 



ThimUer and Lightning, 7th. 



Days Sleighing, none. 



Gales, 35 miles or more per hour; 36m. 



14th, N.N.W.; 48m, 25th, W.S.W. 



