METEOROLOGICAL OBSERVATORY 



OF THE 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



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



BULLETIN No. 63. 



MARCH, 1894. 



MONTHLY SUMMARY. 



Pressure, In Inches. 



Actual maximum reading, . 30.27, 28th, 9 a. 

 Actual minimum reading, . . 29.24, 14th, i A. 



Mean reduced to sea level, 30.088 



Monthly range 1.03 



*Air Temperature. In Degrees Fahr. 



Highest, 69. ; 73. ; 19th 



Lowest 23.; 17, 27th 



Mean, 41.6; 39 6. 



Monthly Range 46. ; .'iG. 



Highest mean daily 57.1;52.5 



Lowest mean daily, 25..5; 24. 



Mean maximum, 49.1 ; .50.7 



Mean minimum, 34.3; 28.6 



Mean daily range, 14.7 ; 22.1 



Greatest daily range, 23. ; 41. 



Least daily range, 6, ; 10. 



Hutniditi/. 



Mean dew point 31.1 



Mean force of vapor 2804 



Mean relative humidity, 67.5 



Wind. 



Prevailing Directions. 



South West, 16 percent. 



North West 15 " " 



West 13 " " 



North 13 " " 



Other directions, 43 " " 



Total movement 4406 m. 



Greatest daily movement, . . . 270 m., 19th. 

 Least daily movement 17 m.; 8th. 



Mean daily movement 142 m- 



Mean hourly velocity, 5.9 m. 



Maximum pressure per square foot,li J lb8.= 

 4Sm. per hour, 30th, at 1 p. 



* Precipitation. In inches. 

 Total precipitation, 1.07; 1.77 



Weather. 



Mean cloudiness observed, ... 55 per cent. 



Number of clear days, 5 



Number of fair days 9 



Number of cloudy days, 17 



Total cloudiness recorded by the Sun Ther- 

 mometer 221 hours or 59 percent. 



Number of days on which .01 inch or more 



rain or melted snow fell 9 



Number of inches of snow on the ground at 

 the close of the month 



Bright Sunshine. 



Number of Hours recorded 150 



Rain, . . 7th,Sth,9th,llth,13th,14th,19th,2l8t, 

 22nd,23rd,25th,29th. 



Snow 15th,25th,29th. 



Total fall in inches, 2 



Mean Ozone, 29 per cent. 



Aurora Borealis, 2nd, 30th. 



Halos. 



Solar, 12th, 13th, 1.5th, 20th, 22nd. 



Lunar 12th, 20th. 



OalfS, of 35 or more miles per hour, 37, 3rd. 

 N.N. W. ; 35 13th,S.E. ;40, 14th, W. ; 37,16th 

 W.; 44, 22nd, N.; 44, 23d. N.W. ; 45,27th, 

 N.W.; 8.5, 2Sth, W.: 48, 30th, 36, 31st, S. 

 W. 



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



