BULLETIN No. 229. 



JANUARY, 1908. 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGKiCULTURAL EXPERIMENT 



STATION . 



Latitude, 42* 23' 48.5" N. Lowgitude 72* 31' 10" VV. 



Height of barometer above ground, ji ft. Above sea level, 2jj.^ ft. 

 Height of Wind Instruments 72 ft. 



MONTHLY SUMMARY. 



Hretnure. lii inclies. 



\Li\iiniiin reduced to freezing. 30.26, 19th, 12 p. 

 .Vliiiimum reduced to freezing, 28,56, 8tii, i a. 

 Keducedt maximum reading, 30.59, 19th, 12 p. 

 Keducedt minimum reading, 28. 86, 8th, i A_ 



Mean semi-daily reduced. 29.970 



Montlily range i-73 



*.■!»»• Teinperatitre. in [degrees Falir. 



Higliest 530. 2ist, 2 P- 



Lowest -S-3-3'st, 7 A_ 



Mean hourly, 25.7 



Mean of means of max. and nun., .... 25.8 



Mean sensible (wet bulb), 22.1 



Monthly range 58.5 



Higliest mean daily, 40.2.21st 



Lowest mean daily 2.0, 3ot]i 



Mean maximum, 3i-2> 



.Mean minimum, 16.3 



Mean daily range l9-o 



Greatest daily range 32.5, 20th 



Least dailv range 7.5,18th 



Uuiaiditi/. 



Mean dew point 16.5 



Mean force of vapor, 144 



Mf.m relative humidity 73.8 



HrecipiUition. In inches. 



Total precipitation, 2.25 



Number of days on which .01 incli or more 



ram or melted snow fell, 10 



Total snow, in inches, .... ij 



" I'emperature in ground shelter. 

 f Keduced to freezing and sea-level. 



tVind. 



Total movement 777oni. 



Greatest daily movement, . . . . 473 m. ,27th 



Lea-it daily movement 4oni., iith 



Me;in daily movement 251 m. 



Mean hourly velocity, 10.5 m 



Miudmum pressure per square foot, 16.0 lbs. = 



56 m. per hour, 27th, 9A., S. W. 

 Maximum velocity for 5 minutes, 42 m. per 



hour 22d, 2P., W. N. W. 



Prevailing Direction. West. 



Summary. 



West 16 per cent. 



Southwest, 13 



Northwest 23 



West Northwest • 13 



South Southwest 13 



Other directions, 22 



tyeather. 

 Mean cloudiness observed, . ■ . .37 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, . . . i4ohrs.=48 per cent. 



Xumberof clear days, 12 



Number of fair days, 7 



Number of cloudy days 12 



Bright Sunshine. 

 Number of hours recorded, . . 154 hrs. = 52* 

 Rain, 4th, 7th, 8th, 12th, i6th, 22d, 26th, 27th 

 Snoif, 4th, 7th, gth, 15th, 23d, 24th, 27th, zStli, 



29th 

 Sleet, 7th. 



n€i!/H Sleighing, None 



Gales, 36 m., 4th, W.; 50 m., 5th, W. N. W.; 



36 m.. 7tli, S. S. W.: 35 m.,.8th, W.; 40 m., 



14th, N. \V.: 36 m., 16th, S. W.; 53 m., 22d, 



W.N.W.; 49 ni., 24th, N.; 56 m., 27th,S.\V, 



