BULLETIN No. 474. 



JUNE, 1928 



MeteoroloQ-ical Observations 



AT THE 



MASSACHUSETTS 



AGIIICULTUIUL EXPERIMENT 



STATIOIM. 



I.atilude, 42° 23' 48.5" N. 



Longitude 72' 31' 10" VV. 



Helf:;hf of ha ro meter ahoi^e ground, 36 ft. Above sea level, 2jj.j ft. 

 Height oj Wind Listruments 6j ft. I'itne used, y^t/iAIer. 



MONTHLY SUMMARY. 



Pressure. In inches. 



Maximum reduced to freezing, 29.84, nth. 8 a. 

 Minimum reduced to freezing, 2g.i8,6th,4 p. 

 Reduced maximum reading, 3o-i3. nth, 8a. 

 Reduced minimum reading, 29.48, 6th, 4 p. 



Mean semi-daily reduced 29.912 



Monthly range 65 



Air Temiieralnre. 



In Degrees Fahr. 



Highest 85.0, inh, 2-30 p. 



85. o, J4th, 3 p 



Lowest 41-5, nth, 5 A 



Mean hourly 63,1 



Mean of means of max. and min 63.6 



Mean sensible (wet bulb) 59.4 



Monthly range 435 



Highest mean daily 72.8, 26th 



Lowest mean daily 54.2, 6ih 



Mean maximum 73-o 



Mean minimum 54-5 



Greatest daily range 37 o. 8th 



Least daily range 4-0. jfb. 20th 



Hiiini<li(y. 



Mean dew point ^7.1 



Mean force of vapor 574 



Mean relative humidity 82 5 



I*re«-ii>ifa4ioi 



In inches. 



Total precipitation, in inches 6.97 



Number of days on which .01 inch or more 

 rain fell ' 1 



Wind. 



Total movement 3632m 



Greatest daily movement 228ni, 30th 



Least daily movement 33m, 8th 



Mean daily movement 121m 



Mean hourly velocity 5.0m 



Maximum pressure per square foot, 5.5lbs = 



33U1 per hour, 2nd. 12 m. 

 Maximum velocity for 5 minutes, i8m per 



hour, loth, 2 P. 

 Prevailing direction, South .Southwest. 

 Summary. 



South Southeast 17 per cent 



Southwest 10 " " 



South Southwest 10 " " 



North Northeast 10 " " 



West 10 " " 



West Southwest 7 " " 



West Northwest 7 " " 



Southeast 7 " " 



Other directions 22 " " 



Weather. 



Mean cloudiness observed .... 63 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 2S6 liours = P3 per cent 



Number of clear days 4 



Number of fair days 7 



Number of cloudy days 19 



Briiihf Sunshine. 



Number hours recorded, 171= 37 per cent. 



Uain. 2nd, 4th, 5th, 6th,9th, lOth, 14th, i8tli, 

 19th, 20th, 21st, 22nd, 24th, 26th, 27th. 

 28th, 29th, 30th. 



Thunder and LiiihninjS, 9th, 14th, 26th, 27th. 



