METEOROLOGICAL OBSERVATORY 



OF THE 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



Height of instruments above ground^51fl. Above sea level, 273.5 ft. ** 



BULLETIN No. I 10. 



FEBRUARY, 1898. 



MONTHLY SUMMARY. 



Pressure. In inches. 

 Miixhmim reduced to freezing, 30.31, 4th, 10a. 

 Minimum reduced to freezing, 28. 09, 16th, 10a. 

 Reduced! maximum reading, 3O.ij4,4th,10A. 

 Reducudj min. reading, . . . 29.01., 16th, 6a. 



Mean reducedf, 30.0.52 



Monthly range 1.631 



*Air Temperature. In Degrees Fahr. 



Highest 54.0; 10th, 3 p. 



Lowest, -19.0, 3d,6 A. 



Mean 26.3 



Mean of means of max. and min., .... 26.0 



Mean sensible(wet bulb) 25.3 



Monthly Range, 73.0 



Highest mean daily, 38.5, Itth 



Lowest mean daily, -0.6, 3d 



Mean maximum 35.9 



Mean minimum, 16.2 



Mean daily range 19.7 



Greatest daily range, 40.0, 3d 



Least daily range 6.0, 12th, 22d 



Uumidity. 



.Mean dew point, 21. S 



Mean force of vapor 161 



Mean relative humidity, 83.1 



^yind. 



Prevailing Direction, West. 



Summary. 



North North East, 14 per cent. 



South West II " " 



South South West 11 " " 



North Wett 21 " " 



West, 21 " " 



Other directions 22 " " 



Total movement, 3699 m. 



Greatest daily movement, .... 448 m., 1st 



Least daily movement, &m.,7th 



-Mean daily movement, 132.1 m. 



Mean hourly velocity, 5.5 m. 



Maximum pressure per square foot,15.5 lbs = 

 56 m. per hour, 5 P., 16lh, N.W. 

 Precipitation. In inches. 



Total precipitation 3.80 



Number of days on which .01 inch or more 

 rain or melted snow fell, 9 



Snow total in inches, 15 



Weather. 



Mean cloudiness observed, . . 64.0 per cent. 



Total cloudiness recorded by the Sun Ther- 

 mometer, . . .158 hours or 53.0 per cent. 



Number of clear days 7 



Numberof fair days, 7 



Number of cloudy days, 14 



Sright Stiiishine. 



Number of Hours recorded, 138 hours or Hi 



Rain, 5th, 12th, 18th, 19th, 20th, 21st, 22d. 



Snow, 1st, 14th, 15th, 19th, 20th, 21st, 22d, 

 23d, 24th, 26th. 



Hail, 14tli, Ifth, 20th, 2l8t. 



Gales, ot 35 or more miles per liour, 45m., 

 1st, N.N.E.; 56m. ,16th, N.W.; 40 m., 21st, 

 N.N.E. 



Snow on ground at end of month, 8 inches. 



Days of sleighing a8 



* Temperature in ground shelter. 



t Reduced to freezing and sea level. 



• • Determined from levels of B. & M. R. U. 



