METEOROLOGICAL OBSERVATORY 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



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



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



BULLETIN No. 74. 



FEBRUARY, 1895. 



MONTHLY SUMinARY. 



Pressure. In inches. 

 Actual maxinuim reaillng, . . 30.l6,3tl, 11 a. 

 Actual niininuini reatling, . iS.'i.M, Stli, 7 A 



Mean reduceil to sea level, -29.918 



Moiitlily range 1.909 



*Air Tetnperatiire. In Degrees Fahr. 



Highest 47, -iSth; 45,17th 



Lowest -6,-10, 6th 



Mean, 22.3; 19.5 



Monthly Range 53. ; 55. 



Highest mean daily, 37.6, 38.5 



Lowest mean daih' 1.2; -1. 



Mean maximum, 30.7; 31.5 



Mean minimum, 13.9; 7.6 



Mean daily range 16.7; 23.9 



Greatest daily range, 28. ; 41. 



Least daily range, 9. ; 15. 



Humidity. [ 



Mean dew point, 17.1 



>Iean force of vapor I276i 



Mean relative humidity 83.9 



Wind. 

 Prevailing Directions. 



.Soutli West 11 per cent. 



North West, 27 " " 



South, 17 " " 



West, 12 " " 



Other directions, 33 " " 



Total movement 3920 m. 



Greatest daily movement, . . . 435 m., 8th 

 Least daily movement 3m.;2Sth 



Mean ilaily movement 140 ni. 



Mean hourly velocity 5.8 m. 



Maximum pressure per square foot, 251bs.= 

 71 m. per hour, 8th, at 3 P. 



* Precipitation. In inches. 



Total precipitation 1.05 



Weather. 

 Mean cloudiness observed, ... 39 per cent. 



Number of clear days 12 



Numberof fair days, 9 



Number of cloudy daj'S, 7 



Total cloudiness recorded by the Sun Ther- 

 mometer Ill hours or 37 percent. 



Number of days on which .01 inch or more 



rain or melted snow fell, 5 



Number of inches of snow on the ground at 

 the cU'Se of the montli, 8 



Sright Sunshine. 



Number of Hours recorded, 187 



Shou-, 2d, 4th, 7th, S-th, 21st, 2.5th. 



Total fall in Inches 14^ 



Mean Ozone, 37 per cent. 



Hal OS. 



Solar 3d, 7th, 12th 



Lunar 1st, 3d, 4th, 6th, 8th 



Gales, of 35 or more miles per hour, 39,2nd, 

 N.W.;35,4th, N.W.; 49, 5th, N W.; 49,6th, 

 N.W.; 71, 8th, N.W.; 49, 9th, W.; .37,21st, 

 W.; 49,22nd, W.N.W.; 47, L'5th, WN.tV. 



*The rtr«t figures denote readings at top of tower, the second at base. 



