METEOROLOGICAL OBSERVATORY 



OF THE 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



Latitude, 42° 28' 48.5" N. Longitude, 72° 31' 10" W. 



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



BULLETIN No 46. 



OCTOBER, 1892. 



MONTHLY SUiVlMARY™ 



23. 



48.6 



54. .5 



62. 



40. 



61.1 



36.1 



Pressure. In inches. 

 Actual maxhnnui reading, . . 30.14, 13lh,8A. 

 Actual mininuim reailing, . . 29.16, 29th, 2 P. 



Mean reiluced to sea level, 29.896 



Monthly range, 98 



*Air Teinperntiire. In Degrees Fahr. 



Highest, 71. ; "7.5 



Lowest 33. 



Mean, . 50.8 



Monthly Range, 38. 



Uighest mean daily, 59.9 



Lowest mean daily 42.3 



Mean maximum, 57. 5 



Mean minimum, 43.5 



Mean daily range 14.1 



Greatest daily range, 25. 



Least daily range, 2.5 



Humidity. 



Mean dew i)i)int, 41 



Mean force of vapor, 41.52 



Mean relative humidity 65.5 



Wind. 



Prevailing Directions. 



Nortli, 18 percent 



South West, 16 " 



South, !4 " 



North West, 10 " 



Other directions, 4-2 n .. 



Total movement 4071 m. 



.37.5 

 12. 



Greatest daily movement, . . . . 276 m., Ist. 



Least daily movement, 29 m. 28th., 



Mean daily movement, 131m. 



Mean hourly velocity, 5.4 m. 



Maximum pressure per square foot, 12Jlbs.= 

 50 m. i>er hour, 6th, at 1-30 P. 



* I'recipitntion. In inches. 



Total precipitation, .52; .66 



Weather. 



Mean cloudiness observed, . . . 46 per cent. 



Number of clear days 8 



Number of fair days, 11 



Number of cloudv days, 12 



Total clou<liness recorded by the Sun Ther- 

 mometer, . . . 163 hours or .52 per cent. 



Number of days on which .01 inch or more 

 rain fell, 7 



Frost, . 6th. 10th, 12th, l.Ith, 22d, 24th, 2.5th, 

 27th, 28th, 31st. 



Bright Sunshine. 



Number of Hours recorded 178 



Rnin, 3rd, 4th, 5th, 9th, 16th, 21st, 26th, 2!nh . 



Me<tn Ozone, 28 per cent. 



Hdlos. 



Solar, 1.5th, 20th. 



Ooronae, 2d, 4tli, .5th,6th. 



Galea, of 35 or more miles per hour, 48, 1st, 

 N.N.E. ; .50, 6th, N.W. ; :J7, 21st, N.W. ; 49, 

 23d, N.W.; .36, 24th, N.W.; 37, 29th, S.W. 



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



