METEOROLOGICAL OBSERVATORY 



OF THE 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



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



BULLETIN No. I 18. 



OCTOBER, 1898. 



MONTHLY SUMMARY- 



Pressure, In inches. 

 Maximum reduced to freezing, 30.17, 4th, 7a. 

 Minimum reduced to freezing, 29.08, ■22d, 4p. 

 Reilucedt maximum reading, 30.46, 4tli, 7a. 

 Reducedf min. reading, .... 29.37, 22d, 4p. 



Mean reducedf 30.089 



Montlily range j.09 



*Air Temperature. In Degrees Falir. 



Highest 86.5, 1st, 3p. 



Lowest 27,18th, 5a., 28th, 6a- 



Mean, 51.1 



Mean of means of max. and min. 51.1 



Mean sensible(wet bulb), 49.4 



Monthly Range, 59.5 



Highest mean daily, 72.6, 4th 



Lowest mean daily 36.8, 30th 



Mean maximum 60.9 



Mean minimum 41.3 



Mean daily range 19.6 



Greatest daily range, 33.0, let 



Least daily range, 7., 15th 



IIu}nidity. 



Mean dew point 46. 



Mean force of vapor 422 



Mean relative humidity, 83.6 



Wind. 

 Prevailing Direction, West. 

 Summary. 



North West 23 per cent. 



West, 16 " " 



North 10 " " 



West South West 10 per cent. 



South West 10 " " 



South South West, 10 " " 



Other directions 21 " " 



Total movement 3999 m. 



Greatest daily movement, . . . 288 m., 27th 



Least daily movement 37 m., 2d 



Mean daily movement 129 m. 



Mean hourly velocity, 5.4 m. 



Maximum pressure per square foot, 12.0 Ibs^ 



49m. per hour, 23d, IP., W, 



Precipitation. In inches. 



Total precipitation G.27 



Number of days on which .01 inch or more 



rain or melted snow fell, 11 



Weather. 



Mean cloudiness observed, . . 62.0 per cent. 

 Total cloudiness recorded by the Sun Tlier- 



mometer, . . . 185 hours or 54.0 per cent. 



Number of clear days 10 



Number of fair days, 5 



Number of cloudy days 16 



Rriglit Sutishine. 

 Number of Hours reconled, 157 hours or 46?t 

 iJaiH, 4th, 5th, 7th, Sth, 12th, I4th, loth, 19th, 



21st, 22d, 23d, 26th, 27th, 29th, 30th. 

 Frosts, 7th, 10th, 13th, 17th, 18th, 28th, 29th. 

 Oales, of 35 or more miles per hour, 35m., 



6th,N.N.E. ; 35in., 9th, N.W.; 38m., 11th, 



S.vy.; 35m., 15th, S.W.; 49m., 23d, W.; 



44m., 26th, S. ; 46m., 27th, N. W. 

 Thunder and Lightning, 4th. 



• Temperature in ground shelter. 



t Reduced to freezing and s«a level. 



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



