METEOROLOGICAL OBSERVATORY 



OK TIIK 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



flpight of instruments above ground, 51 ft. Above se<i level, 260 ft. 



BULLETIN No 54. 



JUNE, 1893. 



MONTHLY SUMMARY. 



freimiire. In inches. 

 Actual inaxiinuni reading, . . :}0.08, 8lh, 8 a. 

 Actual mininuim reading, . . 29.41, 2l8t, .'i P. 



Mean rcilucod to sea level, 30.05(1 



Monthly range, (!7 



*Air Temperature.. In DcgrCfs Fiihr. 



Highest, 96, 94, 20tli 



Lowest .50, 27th; 41. .5, 8th 



Mean, r,8.4; (>(;.9 



Monthly Range, 4fi. ; .52.5 



Highest mean daily, 8:2.8; 78.5 



Lowest mean daily, .56. ; .54. 



Mean maximum, 79.1 ; 79.7 



Mean minimum (!0. ; .54.2 



Mean <laily range, 19.1 ; 25.5 



Greatest daily range, 32. ; 41. 



Lea.st daily range, 2. ; 9. 



Humidity . 



Mean dew point, 58.3 



Mean force of vapor 7303 



Mean relative humidity, 71.1 



Wind. 



Prevailing Directions. 



North, l(i per cent. 



South West, 13 " 



South, .South West 13 " 



South 9 " " 



Other directions, 49 " 



Total movement, 3572 m. 



Greatest daily movement, . . . 2.50 m., ICth. 



Least dally movement, 57 m.; 27th. 



Mean daily movement, 119 m. 



Mean hourly velocity, . 4.9 m. 



Maximum pressure per square foot, 9 lb8.= 

 42 m. per hour, 18th, at 2 P. 



* frecijyitation. In inches. 



Total precipitation 2.42 ; 3.3-' 



Weather. 



Me,an cloudiness observed, . . 58 per cent. 



Number of clear days, !' 



Number of fair days, " 



Numl)er of cloudy days, '4 



T6tal cloudiness recorded by the Sun Thcr 



mometer, ... 277 hours or 57 per cent. 

 Number of days on which .01 inch or more 



rain fell, * H 



Bright Sunshine. 



Number of Hours recorde<l, 209 



Rain, . . 4th, 6th, 13th, 14th, 17th, 22nd, 23d, 



24th, 25th, 26th, 29th, .30th, 



Hail, 30th 



Rainhotv, 4th. 



Thunder and Li(/htnlni/, 4th,6th,llth,30th. 



Mean Osone, 28 per cent. 



Jidlos . 



Solar, 7th, 14th, 16th 



Oales, of 35 or more miles per hour, 42, 



18th, N. 



♦The first figures denote readings at top of tower, the seconil at l)iis(.'. 



