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,51ft. Above sea level, 273.5 ft. ** 



BULLETIN No. III. 



MARCH. 1898. 



MONTHLY SUMMARY, 



Pre9»ufe. In inches. 

 Maximum reduced to freezing, 30.45, 26t.h,7A. 

 Minimum reduced to freezing, -id.-lS, 23d, 6 A. 

 Reducedt maximum reading, 30.7t5, 26tli,7A. 

 Keducedt min. reading, . . . 29.59., 23d, 6a. 



Mean reducedf 30.203 



Monthly range, 1.17 



*Air Temperature. In Degrees Fahr. 



Highest, . 60.0; nth, 4 p.| 



Lowest 14.5, 4th, 6 A_ 



Mean 39.6 



Mean of means of max. and min. 39.7 



Mean sensible{wet bulb), 36.3 



Monthly llange 45.5 



Highest mean daily, . 47.6, 27th 



Lowest mean daily 28. 6, 4tli 



Mean ma.vimum, 50.4 



Mean minimum 29. d 



Mean daily range, 21.4 



Greatest daily range, 35.0, 9th J 



Least daily range 6.5, 2btli 



Htitnidity . 



.Mean dew point 30.5 



Mean force of vapor 260 



Mean relative humidity 72.6 



Whid. 



Prevailing Direction, South West. 



Summary. 



North IS per cent- 

 South, 23 " 



VVestNorth VVett 13 " 



Other directions .M " 



Total movement, 3864 m. 



Greatest daily movement, ... 321 m., 31st 



Least daily movement 17 m.,7th 



Mean daily movement 125.0 m. 



Mean hourly velocity 5.2 m. 



Maximum pressure per square f oot,15.5 lbs = 

 56 m. per hour, 2 P., 20th, W. 



Precipitation. In inches. 



Total precipitation 1.63 



Number of days on which .01 inch or more 



rain or melted snow fell, 9 



Snow total in inches 1.5 



Weather. 

 Mean cloudiness observed, . . 53.0 per cent. 

 Total cloudiness recorded by the Sun Ther- 



mometer, . . .171 hours or 46.0 per cent. 



Number of clear days 8 



Sumber of fair days 12 



Number of cloudy days IJ 



Sright Sunshine. 

 >^uniber of Hours recorded, 200 hours or 54)( 

 KoiH, 3d,4th, 12th, 13th, 16th, 17th, 19th, 22d, 



23d, 27th, 28th, 29th, 31st. 

 Snow, 2d, .3d, 4th, 16th, 21st, 31st. 

 Aurora, 14th, loth. 

 OaleSfOt 35 or more miles per hour, 37m., 



13th, N.N. W. ; 36m. ,14th, N.W. ; 37m. ,17th. 



W.N.W.; 56m.. 20th, W.; 39m., Slst, N. 



Snow on ground at end of month, 



Days of sleighing, 8 



• Temperature in ground shelter. 



t Reduced to freezing and sea level. 



* * Determined from levels of B. & M. K. K. 

 J Other dates also. 



