METEOROLOGICAL OBSERVATORY 



OK THE 



Hatch Experiment Station, 



MASSACHOSETTS AGRICULTURAL COLLEGE, 



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



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



BULLETIN No. 68. 



AUGUST, 1894. 



MONTHLY SUMMARY. 



Pressure. In Inches. 



Actual maximum reading, . 29. 9G, 6th, 6 A- 

 Actual minimum reatling, . 29.52, 3rd, 5 p. 



Mean reduced to .sea level 30.033 



Monthly range, 44 



*Air Temperature. In Degrees Fahr. 



Highest 89.; 9J.; 23rd 



Lowest 46; 37., 22nd 



Mean, 69.3 ; 68. 



Monthly Range 43. ;54. 



Highest mean daily, 7.'i.8; 76. 



Lowest mean daily .59.8; .59. 



Mean maximum, 79.8; 81.6 



Mean minimum .'i9. ; 54.3 



Mean daily range 21. ; 27. 



Greatest daily range 3.''. ; 45. 



Least daily range 5. ; 11 



Humidity. 



Mean dew point, 58.6 



Mean force of vapor, 7547 



Mean relative humidity, 69.9 



Wind. 



Prevailing Directions. 



South, . 25 per cent. 



South West 19 " " 



North, 17 " " 



North West, 13 " " 



Other directions, . ....... 26 " " 



Total movement 1920 m. 



Greatest daily movement, . . . 130 m., 21st. 

 Least daily movement 4 m.; 6th. 



Mean daily movement, 62.0 m. 



Mean hourly velocity 2.6 m. 



Maximum pressure per squai'e foot, 9^ lbs. = 

 44 m. per hour, 16th, at 7 a. m. 



* Frecipitntion. In inches. 

 Total precipitation, 19; .31 



Weather. 



Mean cloudiness observed, . . .44 per cent. 



Number of clear days 12 



Number of fair days 9 



Number of cloudy days, 10 



Total cloudiness recorded by the Sun Ther- 

 mometer, . . . 190 hours or 41 per cent. 

 Number of days on which .01 inch or more 

 rain fell, 7 



Bright Sunshine. 



Number of Hours recordeil, 238 



Rain, . . 2nd,3rd 7th, 9th, 12th, 13th, ]5th,20th, 



30th. 



Frost, 22nd. 



Thimder and Tjightning , 3rd, 15th, 19th, 



30th. 



Mean Ozone, 19 per cent. 



Oales, of 35 or more miles per hour, 37, 9th, 

 N. "W.; 44, 16ih,N. ; 37,21st, N. W; 39, 

 26th, N. 



*The first figures denote readings at top of tower, the second at base. 



