METEOEOLO(^iCAL OBSERVATORY 



Hatcli Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



Height of instruments above grou7id,51ft. Above sen levels 273.5 ft. ** 



BULLETIN No. 98. 



FEBRUARY, 1897. 



MONTHLY SUMMARY. 



treasure. In inches. 

 Maximum reduced to freezing, 30. 38, 3Stli,12p. 

 Minimum reduced to freezing, •29.23,23d, 7 A. 

 Reducedt maximum reading, 30.70, 28ili,12 P. 

 Reducodt min. reading, . . . 29..i5, 23d, 7 A. 



Mean red need f, 30.056 



Montlily range 1.15 



*Air Temperature. In Degrees Fahr. 



Higliest 48.0; 21st 



Lowest -11., 1st 



-Mean 25.1 



Mean of means of max. and min., .... 25.4 



Mean sensible(wet bulb), 23.5 



.Monthly Range, 59 



Ilighest mean daily, ." . 39.2, 7th 



Lowest mean daily, 6.8, 1st 



.Mean maximum, 35.0 



Mean minimum, 15.9 



Mean daily range, 19. 1 



Greatest daily range, 42.0, 5th, 14tli 



Least daily range, 5.0, 12tli 



Uiiiniditi/. 



Mean dew point 18. 1 



Mean force of vapor, 151 



Mean relative humidity, 75.7 



Wind. 



Prevailing Direction, West North West. 

 Summary. 



North West 14 per cent. 



West, 11 " " 



West North West II " 



North, 14 " 



.South 21 " 



Other directions, 29 " " 



Total movement 4493 ra. 



Greatest daily movement, .... 400 m., 3d 



Least daily movement, 11m., 1st 



-Mean daily movement, 160.5 m. 



Mean hourly velocity 6.7 m. 



Maximum pressure per square foot, 10.0 lbs.=: 

 45 m. per hour, 10 a. 3d, N.N.E. 



I'recipitation. In inches. 



Total precipitation, 2.52 



Number of days on which .01 inch or more 



rain or melted snow fell, 9 



Snow total in inches, 13. 



Weather. 

 Mean cloudiness observed, ... 51 per cent. 

 Total cloudiness recorded by the Sun Ther- 



mometei-, . . . 218 hours or 59 per cent. 



Number of clear days, 10 



Number of fair days, 6 



Number of cloudy days, 12 



Bright Sunshine. 



Number of Hours recorded, 154 hours or 41* 



Rain, Gth, 7th, 21st, 22d, 23d. 



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

 3d, N.N.E. ; 44m., 6th, E. ; 39ni., ISth, 

 W.N.W.; 40m., 19th, N.W.; 36m., 2Ist, 

 W.N.W. ; .3Sm., 24th, W. ; .35m., 28th, S.W . 



Snow, . 8th, 12th, 1.5th, 16lli, 19th, 20th, 21st, 

 22d,23d. 



Day.i of sleig?iinff, tor hciwy sleighs,. .18 

 for light sleighs, .28 



* Temperature in ground shelter. 



t Reduced to freezing and sea level. 



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



