METEOROLOGICAL OBSERVATORY 



Hatcli Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



Height of instruments above groxmd^ 51 ft. Above sea level, 260 ft. 



BULLETIN No- 78. 



JUNE, 1895. 



MONTHLY SUMMARY. 



Pressure. In Inches. 

 Actual maximinu reading, . SO. -23, 16th, 7 A. 

 Actual minimum reading, . . 29.55, 13th, 9 P. 



Mean reiluced to sea level 30.172 



Monthly range, 68 



*Air Temperature. In Degrees Fahr. 



Highest 98; 95,20th 



Lowest, 48, 8th ; 44, 9th 



Mean, ." . 70.5; 69.1 



Montlily Range 50.; 



Highest mean daily, 83.4; 



Lowest mean daily 59. ; 



Mean maximum, 82.1; 



Mean minimum, 60.7 ; 



Mean daily range 21.4; 



Greatest daily range, 41. ; 



Least daily range, 4. ; 



Humidity. 



Mean dew point, 



Mean force of vapor 



Mean relative humidity 



Wind. 

 Prevailing Directions. 



.Soutli West 21 per ( 



South l.S " 



•South East, 19 " 



Xorth 12 " 



Other directions 35 " 



51. 



t-0. 

 57. 

 81.3 

 .56.9 

 24.3 

 45. 

 4. 



59.6 

 8000 

 68.5 



Total movement, 30.50 ni. 



Greatest daily movement 201 m., 7th 



Least daily movement 34 m.; 30th 



Mean daily movement, 101 m. 



Mean hourly velocity, 4 m. 



Maximum pressure per square foot, 81bs.= 

 40 m. per hour, 6th, at 2 P. 



* Precipitation. In inches. 



Total precipitation, 2.76 



Weather. 



Mean cloudiness observed, ... 48 per cent. 



Number of clear days 11 



Number of fair days, 4 



Number of cloudy days, 15 



Total cloudiness recorded by the Sun Ther- 

 mometer 240 hours or 49 per cent. 



Number of days on which .01 inch or more 



rain fell 11 



Briffht Sunshine. 



Number of Hours recordeil, 246 



«a*»», 3d, 4th, 5th, 6th, 13th, 21st, 23d, 24th, 

 2.5tli, 27th, 28th, 29th, 30th. 



Rainbow, 29lh. 



Thunder and Lightning, 5th,13th,23d,24th, 

 2.5th, 2Slh, 29th, 30th. 



Hfean Ozone, 21 per cent. 



Halos. 

 Gales, of 35 or more miles per hour, 40, 6th, 

 W. ; 35, 7ih, E.S.E. ; 39, 1,5th, W. ; 37, 29th, 

 S.W. 



*riie flrst figures denote readings at top of tower, the second at base. 



