METEOROLOGICAL OBSERVATORY 



llatcli Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



Latitude, 42° 23' 4.S.5" N. Longitude, 72° 31' 10" W. 



Height of instruments above grotind, 51 ft. Above sea level, 260 ft. 



BULLETIN No 59. 



NOVEMBER, 1893. 



MONTHLY SUMMARY. 



yressure. In inches. 

 Actual maximum reading, . 30.40, 26th, 10 P. 

 Actual minimum reading, . . 29.25, l.'jth, 2 P. 



Mean <-educcd to sea level, 30.124 



Afouthly range, . . 1.15 



*Air Temperature. In Degrees Fahr. 



Highest, ."if, ; 63, 2nd 



Lowest, 17; 11, 27th 



»[ean, 40.2 ; 38.2 



Monthly Range 41. ; 52. 



Highest mean daily, 52.1; 49.5 



Lowest mean daily, 25.2; 21. 



Mean maximum, 45.9', 48.8 



Mean minimum, 33.6; 27.6 



Mean daily range, 12.3; 21.1 



Greatest daily range, 22. ; 37. 



Least daily range, 3. ; 11. 



Humidity. 



.>rean dew point, . 



Mean force of vapor, 



>[ean relative humidity, 



Wind. 

 Prevailing Directions. 



South West, 22 per cent. 



North West H " " 



Xorth, 13 " " 



.South, 11 " " 



Other directions, . ....... 40 " " 



Total movement, 4179 m. 



29.9 

 .2644 



68.8 



Greatest daily movement, . . . 286 m., 28th. 



Least daily movement, 7 m.; 8th. 



Mean daily movement 139 m_ 



Mean hourly velocity 5.8 m. 



Maximum i)ressure per square foot, 14 lbs.= 

 53m. per hour, 24th, at 10 P. 



* Precipitation. In inches. 



Total pi-ecipitation, 1.96; 2.81 



Weather. 



Mean cloudiness observed, ... 49 per cent. 



Number of clear days, 8 



Number of fair days, 6 



Number of cloudy days 16 



Total cloudiness recorded by the Sun Ther- 

 mometer, .... 160 hours or 54 per cent. 



Number of days on which .01 inch or more 



rain fell, 8 



Bright Sunshine. 



Number of Hours recor<ied 133 



Tiain, 3d, 4th, 13th, l.ith, 18lh, 21st, 22d, 28th. 



finow, 4th, 19th, 20th, 21st, 24th. 



Mean Ozone, 21 per cent. 



Aurora Borealis, 3d. 



Halos. 



Solar, 7ih, 8th, 9ih, 21st, 2.3d. 



Lunar 23d. 



Gales, of .35 or more miles per hour, 37, 9th, 

 N • 48 16th, W.;45, 17th, S.W.; 42. 18th, 

 N.W.; 53, 24th,W.N.W.; :^5, 25th, 'S.W.; 

 45, 28th, S.E. ; 35, 20th, S. W. 



♦The first figures denote readings at top of tower, the second at base. 



