METEOROLOaiCAL 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. 85. 



JANUARY, 1896. 



MONTHLY SUMMARY. 



Pressure, In inches. 

 Actual maximum reading, . :50.'26, 10 a., ir.tli 

 Actual minimum reading, . . 29.37, 11 A., 3rd 



Mean reduced to sea level, 3(i.lfl(i 



Monthly range, 0.89 



*Air Temperature, In Degrees Fahr. 



Highest 40, 41, 3rd 



Lowest, -7, -12, Gth 



Mean ^ 23.-2 



Monthly Range 47.; 53. 



Highest mean daily 34.5, 25tli 



Lowest mean daily, -0.8, Gth 



Mean maximum 27.9; 29.6 



Mean minimum 17.3; 11.9 



Mean daily range 10.6; 17.7 



Greatest daily range, . . . 25. 12th; 29. 17th 

 Least daily range, 2. ; 7., 1st 



Bumidity. 



Mean dew point, 14.3 



Mean force of vapor 130 



Mean relative humidity 73.3 



Wind. 

 Prevailing Directions. 



Xorth, 36!per cent. 



North North West 13 " " 



North West, 13 " " 



West 13 " " 



Other directions, 25 " " 



Total movement 4943 m. 



Greatest daily movement, . . . 363m., 4th 



Least daily movement 41m.; 21st 



-Mean daily movement, 159 m- 



Mean hourly velocity 6.6 m. 



Maximum pressure per square foot, 15 Ibs.^ 

 55 m. per hour, 1st, 4-30 P. M. 



* Precipitation. In inches. 



Total precipitation 0.53, 1.07 



Number of days on which .01 inch or more 



rain or melted snow fell, 7 



Snow total in inches 6.6 



Wentlier. 

 Mean cloudiness observed, ... 43 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, ... 137 hours or 47 per cent. 



Number of clear days 13 



Numberof fair days 8 



Number of cloudy days, 10 



I Bright Sunshine, 



Number of Hours recoi'ded 157 



Kail., 24th,25th. 



Gales, of 35 or more miles per hour, 55, 1st, 

 W.N.W.; 38, 3d, N.W.; 52,4th, N.W.;48, 

 5th, W.N.W.; 36, 6th, N.; 38, 8th, N.; 39, 

 24th, N.N.E. 

 Snotv, 7th, 9th, 10th, 12th, 19th, 24th; traces 

 3d, 14th, 25th, 26th. 



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



