METEOROLOaiCAL OBSERVATORY 



OF THK 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



LiUitiule, 42° 23' 48.5" N. Longitutle, 72° 31' 10" W. 



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



BULLETIN No. 61. 



JANUARY. 1894. 



mONTHLY SUMiVlARY. 



Pressure. In inches. Mean daily niovenient ],S5 ni. 



. ^ , ,. .„. ,, ,.^, ,„ Mean hourly velocity, 5.6 in. 



Aetna niaxunnm reaaing, . 30.4/ 1, h, 10 P. Maxininm pressure per square foot, 20 11>8.= 

 Actual niininimn reading, . . 28.5;j, 3Uth (, a ,;3,„ ',. jj^ur, i-jth. at 2 i'. 



Mean reduced to sea level 30.1 i.'i 



Monthly range 1.88 * l^reciintation. In Inches. 



*Air Temperature. In Degrees Falir. I'"''*' piecipitation 2.16 



Highest 50, 24th; .53, 2.'ith! Weather. 



Lowest 7, 13th; 1, 2!tthMean cloudiness observed, . . 52.8 per cent. 



Mean, 28./; 2(i. ■ Number of clear days 7 



Monthly Range, ^.f „; 52. k[u,nber of fair days, 7 



Highest mean daily 396: 39^'lNumberof cloudy days, 17 



Lowest mean daily '/:' 'oI.;lTotal cloudiness recorded by the Sun Ther- 



Mean maximum £*,?'?>;-! mometer 174 hours or 59 per cent. 



Mean minimum, 22.6; h.7|j^y,,,,je,. ,-,f ,,.,^g o„ ^^.,,i,.,, Oi i„ch or more 



Mean daily range, 11-9; 19-5 



Greatest daily range, 24. ; 34. 



Least daily range, 3. ; 7. 



Hutnidit;/. 



Mean dew point 21.6 



Mean force of vapor, 1599 



Mean relative humidity 78.8 



Wind. 



Prevailing Directions. 



Northwest 22 percent. 



North 22 " " 



South, 17 " " 



South West 8 " " 



Other directions 31 " " 



Total movement 4193 m. 



Greatest daily movement, . . . 441 m., 12tti. 

 Least daily movement, 11 ni.; 14th. 



rain or melteil snow fell, 16 



Number of inches of snow on the ground at 

 the close of the month J3 



Jtr'ight Sunshine. 



Number of Hours reconied 



K«m. 3d ,5tli, 1.5th. Kith, 19tli,21st.22d.24th 

 Sn«?r.6th,7th, lOth, llth, 14th, 18th, 26lh 

 29th, 30lh, 31st. 



Total fall in inches, 



Hail, 3rd, 



UTenii Ozone, 30 per 



Aurora Borealis, 



Ilalos. 



Solar, 9th, 15th, ?6th. 



Lunar, 13th. 



Gales, of 35 or more miles per hour, 39, 8th' 

 W.X.W. ; 63 12th, X.W. ; 47. 13th,N.W.; 42, 



16th, N.; '.7, 18th. S.W.; 40, 19th, N.; 42, 

 24th, S.W.; 42, 25th, N.W. ; 35, 29th, N.; 

 52, 30th,N.\V.; 49,31st, W.N.W. 



. 120 

 ,25th. 

 ,27th, 



. 191 

 I5th. 

 cent. 

 . 3d. 



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



