METEOROLOGICAL OBSERVATORY 



Ul' TllK 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



I.atittide. 42° 2;V 4^.5" N. Loiigiuide, 72° 31' 10" W. 



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



BULLETIN No 5 1 



MARCH,- 1893. 



MONTHLY SUiVIiVlAKY. 



I'ressiire. Iiiinclios. Mean hdiirly velocity, . . 7.7 m. 



A<-tUiil maximuni rcadini;, 30.3;J, -JOth, 10 A. MJtximum pressure per square foot, 18M1)S.= 

 , 4. , . . ,. " ,, „,. ,,. „ in m. per hour, 15th, at 10-30 p. 



Actual nunimum reading, . . -iit.OSo, 4th, 2 .pj ' 



Mean reihiceil to sea level, 30.0()5| *Pi-ecipitfttioii. In inches. 



Monthly range, '■'■i'i Total piveipitation, 2..59; 3.66 



*Air Tenipertitiiri'. In Degrees Falir. „ 



Highest 4!., 31.t;.r2..^, 13th wreathe,: 



Lowest, . .' j5.-,tl,- 4 ;j,.,l Mean clouiliness observed, . . . 46 per cent. 



Mean .jj 4- .jo 4! Number of clear days, 9 



Monthly Range 34. ; 4S..5 >>'"mljcr of fairdays 7 



Highest mean daily, 4-2.5: 41 5 Number of cloudy days, la 



Lowest mean dailv, ]'.).'r. i,j.a|Total cloudiness recorded by the Sun Ther- 



Mean maximuni, :',!). 7: 40.31 



moineter. 



199 hours or .'54 per cent. 



., . . Number of days on which .01 inch or more 

 Mean minimum ■li\.. : :>().:>[ rain or melted snow fell, 13 



Mean daily range, 12.9; 



Greatest dailj- range, 23. ; 



Least daily range, 3. ; 7. 



Ifiiniifliti/. 



Mean dew point, 2 1. 



Mean force of vapor, 1939 



Mean relative humidity, . 71.4 



Wiiul. 

 Prevailing Directions. 



North, JO percent. 



North West, l.i " 



.South West, 12 " " 



North North West II" 



Other directions, ii " " 



Total movement, ri^ol m. 



Greatest daily movement, . . . 437 m., 10th. 



Least daily movement 7.i m. ; 26tli. 



.Mean ilailv movement, IS") in. 



'•'■''jNumber of inches of snow on tlie ground a* 

 2S..') the close of the monih, ........ 



Tiright SiDisIiine. 



Number of Hours recordeil, 172 



Brtm,9th, nth, 12th, 14tb, 1.5th, 21st,i.3d,2ltli, 



30th. 

 Snoif, 1st, 3d, 4th, .^th, l.itb, 22(1, 23d, 



Total fall in inches, 3'| 



Tliumlfr find LitjIitnitH/ 14tli. 



Ifrean O^one, 4.5 per cent. 



Ilnlos. 



Solar, 7tli, Uih, 27th. 



Lunar, 31st. 



Grt/cs, of 3.") or more miles per hour. 4."), 1st, 



N.N'. VV.; 51,2d, N. W.; 41, 4th, N. N. K.; 



40, 6th, N.N. \V.; lio, 9tli. N.N.K. ; .Vi.lOtb, 



N.P:. ; 61, I.ith, N. W.; Ar,, 16th, N.\V.:39, 



28th, N.: 43, 30tli, S.W. 



*Tlie lirst lignres ile;ioie readings at top of tower, the second at base. 



