METEOROLOaiCAL OBSEHVATORY 



OF THE 



Hatcli Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



Height of instruments above gronnd^51ft. Above sea levels 273.5 ft. ** 



BULLETIN No- 106. 



OCTOBER, 1897. 



MONTHLY SUMMARY. 



Pressure. In inches. 

 Af aximuni reduced to freezing, 30.36, 3d, 7 A 

 Minimum reduced to freezing, 29.25, 29tli, 5 A. 

 Reducedt maximum reading, 30.ti7, 3d, 7a- 

 Reducedt min. reading, . . . 29. .5.5., 29tli, 5 A" 



Meau reducedt. 30.122 



Montlily range, 1.11 



*Air Temperature, In Degrees Fahr. 



Highest, 84.0; 1st, 10th 



Lowest 20.5,31st 



Mean, 49.9 



Mean of means of max. and min 49.8 



Mean sensible{ wet bull)), 45.0 



Monthly Range, 63.5 



Highest mean daily 71.5,16th 



Lowest mean daily, 36.4, 30th 



Mean maximum, 63.9 



Mean minimum 35.8 Number of clear days, . 



Mean daily range 28.1 Number of fair days, . . 



Greatest daily range, 47., 4th Number of cloudy days. 



Total movement 3938 m 



Greatest daily movement, . . . 339 m., l-.'th 



Least daily movement, 24m. ,3d 



Mean daily movement 127 m. 



Mean hourly velocity . 5.3 m. 



Maximum pressure per square f oot,11..5 lb8.= 

 48 m. per hour, 4 a., 17th, N.N.W. 



frecipitation. In inches. 



Total precipitation, 0.73 



Number of days on which .01 inch or more 

 rain or melted snow fell, 1 



Weather. 



Mean cloudiness observed, . . 39.1 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, . . . 132.0 hours or 39 per cent. 

 14 



Least daily range, 8., 21st 



Uutnidlty. 



Mean dew point, . 39.() 



Mean force of vapor 4ii5 



Mean relative humidity 08.7 



Wind. 

 Prevailing Direction, West South ^A'^est. 

 Summary. 

 South 19 per cent- 

 South Southwest, 13 " " 



North West 10 " " 



North North West 10 " " 



North, 10 " " 



Other directions 38 " " 



Bright Sunshine. 



Number of Hours recorded, 209 hours or 61)4 



Rain, 1st, 12th. 



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



eth, S.; 47 m., 12th, S.S.W.; 41 m., 16th, 



W.N.W.;48m., 17th, N.N.W. 



* Temperature in ground shelter. 



t Reduced to freezing and sea level. 



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



