METEOROLOGICAL OBSERVATORY 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



LiititiKle, 42° 23' 4.S.;V' N. Longitudo, 72° 31' 10" VV. 



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



BULLETIN No. 47. 



NOVEMBER, 1892. 



MONTHLY SUMMARY. 



treasure. In inches. Least daily movement, '2om.l2th., 



Aetiial maximum reading, . 30.14, iTUi, 10 a. ^^lean daily movement, . . 174 m. 



AeHial mininuun reading, . . •2i).16, ISth, (J P. ^I«=^" iK'iirly velocity, 7.3 m. 



Mean reduced to sea level, 29.98S Maximum pressure per square foot, 16 lb8.= 



Monthly range 98 ^^' "^- P^i' I'our, ISth, at 5-45 P. 



*Air Teuiperntiire. In Degrees Fahr. 



.lligliest 64. ; 67. 



Lowest 20. ; 14. 



Mean, 39.3; 37.1 



Monthly Range, 44. ; 53. 



Highest mean daily, .o6.9; 57-5 



Lowest mean dail}-, 26.1; 23.5 



.Mean maximum, 43.8; 46.6 



Mean minimum, 34.1 ; 29.1 



Mean daily range, 9.S; 17.5 



Greatest daily range, 21. ; 31. 



Least daily range, 2. ; 9. 



Hinnittity. 



Mean dew point 32.1 



Mean force of vapor 2783 



Mean relative humidity, 71. 



Wind. 



Prevailing Directions. 



North West, 22 percent. 



Xorth North Kast, ....... 14 " " 



North, 13 " 



South West, 12 " 



Other directions 39 " " 



Total movement 5231 m. 



Greatest daily movement, . . . 4:54 m., 30th. 



* Hrecipitdtion. In Inches. 



Total pre(-ipitation, 3.45; 4.98 



Weather. 



Mean clomUness observed, ... 58 per cent. 



Number of clear days, 8 



Number of fair days, 5 



Number of cloudy days, 17 



Total cloudiness recorded by the Sun Ther- 

 mometer, . . . 183 hours or 62 per cent. 

 Number of days on which .01 inch or more 

 rain or melted snow fell 12 



Bright Sunshine. 



Number of Hours recorded 110 



Rain, 1st, 2nd, 3nl, 4th, 5th, 7th, 9th, 10th, 



15th, 16th, lSth,:21st. 

 Snow, 5th, 9th, 10th, 28th, 29th, 30th. 

 Mean Ozone, 35 per cent. 



Hal OS. 



Solar, 9th, 24th. 



Lunar, 8th. 



Corona, 3rd, 30th. 



Gtilcs, of 35 or more miles per hour, 36, 3rd, 



N. W.; 55, 5th, N. W.; 40, 7th, S. W. ; 42, . 



Sth, S.W.; 35, nth, N.E.; 37, 16th, S.AV.; 



56, 18th, S.S.E.; 40, 22nd, N. W.; 38, '25th, 



N \V. ; 45, 29th, N. ; 46, 30th, N. N. E. 



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



