METEOROLOGICAL OBSERVATORY 



Hatcli Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



.A.3S^HCER,ST- 



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



Height of /> an) meter above ground, Ji ft. Above sea level, 2yj._5 ft. 

 Height of Wind Instruments 72 ft. 



BULLETIN No. 146. 



FEBRUARY, I 90 I 



MONTHLY SUMMARY. 



Pvesaure. In inches. 

 Maximum reduced to.freezing, 30.00, 3d, ; 

 Minimum reduced to freezing, 29.05, I4tli, 2 v 

 Reducedt maximum reading, 30.34, 3d, 7 

 Reducedt minimum reading, 29.37, 14th, 2 



Mean tri-daily reduced, 29.7S8 



Montlily range • o-O; 



*Alr Temperature. In Degrees Fahr. 



Highest, 44.0,26th, 3 P 



Lowest — 4oi 3d, 6 a. 



Mean hourly, - 



Mean of means of max. and min., . - ■ .19-2 



Mean sensible (wet bulb), i7-8 



Monthly range 485 



Highest mean daily, 3'-9, i6th 



Lowest mean daily 11.2, Mtli 



Mean maximum, 28.0 



Mean minimum 10.4 



Mean daily range 17.6 



Greatest daily range, 40.5, 3d 



Least daily range, 5.0, 4th 



Uutnidifif. 



Mean dew point, 10.6 



Mean force of vapor 116 



Mean relative humidity, 68.5 



frecipitntion. In inches. 



Total precipitation, . • 0.62 



Number of days on which .01 inch or more 



rainor melted'snow;fell 4 



Snow, Total in inches, S.o 



Snow on ground at end of month, .... 0.5 

 * Temperature in ground shelter, 

 t Reducedjto freezing and sea-level. 



Wind. 



Total movement 5484m. 



Greatest daily movement, .... 449 ni., 13th 



Least daily movement, 16 m., 3d 



Mean daily movement 195.9 ni. 



Mean hourly velocity, S.2 m. 



Maximum pressure per square foot, 10.5 Ibs.^ 



46 m. per hour, 13th, 8:30 i'., W.N.VV. 

 Prevailing Direction, West, Northwest. 



Summary. 



West, Northv.'est, 21 per cent. 



Northwest, 25 "' " 



West, . • 25 " " 



Other directions, 29 " " 



Weather. 

 Mean cloudiness observed, • • • . 45 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, 124 hrs.=42 per cent. 



Number of clear days, 8 



Number of fair days, 12 



Number of cloudy days, S 



Jtright Sunshine. 

 Number of hours recorded, . . 172 hrs. = 5Sjt 

 Snotv, 4th, 9th, nth, i6th, iSth, 19th, 22d 



24th, 27th. 

 Gales, 35 miles or more per hour, 36m., 5th, 



N.\V .; 38 m., 6th, N.W.; 35 m., 7th, N.; 



35m., Sth, N.W.; 35m., loth, W.N.W.; 



46m., 13th, W.N.W.; 40m., 14th, W.N.W.; 



35 m., 15th, N.W.; 38 m., 21st, W.N.W.; 



37 m,, 25th, S. W.; 39 m., 27th, W. 

 No. days sleighing, . • . . . . 16 



