BULLETIN No. 232. 



APRIL, 1908. 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPERIMEFr 



STATION. 



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



Hei^^Jit of barometer abo7<e ground, JT ft. Above sea level, 2"^.^ ft. 

 Height of Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



freaanre. In inches. 



Mvixunuui reduced to freezing, 30.21. 14th, 8 A 



I7tli, 8 A. 

 Mininuini reduced to freezing, 28.SS, 30th, 12 p- 

 Reduced! niaxinuun reading, 30.52, 14th, S A. 



17th, S A. 



Keducedt minimum reading, 29.17, 30th, 12 p. 



Mean semi-daily reduced, 29.921 



Monthly range 1-35 



*Air Temperature. In Degrees Fahr. 



Highest, 84.0. 23rd, 4 P 



Lowest, 18.0. 17th, 6 A. 



Mean hourly, 45-i 



Mean of means of max. and min., .... 45.9 



Mean sensible (wet bulb), 39° 



Monthly range, 66.0 



Highest mean daily, 68. 7, 26th 



Lowest mean daily, 26.7, 4th 



Mean maximum 57-3 



Mean minimum 34.5 



Mean daily range 22. 8 



Greatest daily range 39-5- 23rd 



Least daily range, 8.0, 8th 



Hiimiditj/. 



Mean dew point, 3i-9 



Mean force of vapor, 3'3 



Mean relative humidity, 64.3 



Precipitation. 



Total precipitation, 



In inches. 



1.97 



Number of days on which .01 inch or more 



rain or melted snow fell, 14 



Total snow, in inches, 



* Temperature in ground shelter, 

 t Reduced to freezing and sea-level. 



Wind. 



Total movement, S2oSn). 



Greatest daily movement, .... 543m., 12th 

 Least daily movement, ...... 127m., 17th 



Mean daily movement, 274 m. 



Mean hourly velocity, 11.4 m 



Maximum pressure per square foot, 32.0 lbs.= 

 80 m. per hour, nth, 6p., N. N. \V. 



Maximum velocity for 5 minutes, 40 m. per 

 hour nth, 6p., N. N. W. 



Prevailing Direction, West Northwest. 

 Summary. 



Northwest 17 per cent 



West, 17 " " 



North Northwest 17 " '' 



South 13 " " 



West Southwest, 10 " " 



Other directions, 26 " " 



Wentlier. 



Mean cloudiness observed, . • . .42 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 125 hrs.=3i iier cent. 



Number of clea/days, iS 



Number of fair days, 5 



Number of cloudy days 7 



Kright Sunshine. 



Number of hours recorded. . . 277hrs. = 6g< 



Rain, 2d, jth, 6th, Sth. 9th, loth, nth, 13th, 

 15th, iSth. 19th, 20th, 2Uh. 2Sth. 30th 



Snow, 2d, 3d, 5th, nth. 13th, 20th. 



Sleet, Sth, 15th. 



Qales, 35 miles or more per hour.. 41 m , 

 2d, N..: 40 m., 3d. N. N. W.: 45m., 4th, 

 W. N. W.: 67m.,gtli, W. N. W. : 80 m., 

 nth, N. N. W.; 55 m., 12th. N. N. W.; 

 36 m., 13th. N.; 49 m , 15th. N. E.: 40 m., 

 i6th, N. N. E.; 38 m., 20th. N.; 45m.. 

 2ist, N. N. W.: 4T m..3oth. S. S. K. 



Thunder and TAffJil ni mj— Sth. 23d, 2Sth. 



