METEOROLOGICAL OBSERVATORY 



Hatch Experiniciit Station 



MASSACHUSETTS AGRICULTURAL COLLEGE 



Latitude. 42° -i.'V -1S..V' N. Lonoiiudo. 72° .-^1' 10" \Y . 



Height of inntyionents above groraid, 51 ft. Aliove se<i level. 260 ft. 



BULLETIN No 38. 



FEBRUARY, 1892. 



inONTHLY sUm/viary. 



f'resmire. In inches. 

 Actual niaxiniuni rea<1in{^, . :{0.42,'27tti, 9 p. 

 Actual niininium rea<tiiijf, . ■-'*.77. l'2Mi, 4 A. 



Mean red uceil to sea level 3n.in(i 



Monthly range, IMH 



*Air Temperature. In Oegreos Fiilir. 



Highest, 47; 4fi.5 



Lowest, ^..t; -7. 



Mean '2.S.4; 2H.1 



Monthly IJange, 44. .i; .53. .5 



Highest mean daily, 40.1:39. 



Lowest mean daily, 12. ; 7.8 



Mean ma.\imum, .3.3.9; .'Jfi. 



Mean minimum 21.9; l(i.2 



Mean daily range 12 : IP. 8 



Greatest daily range :i4..i : .T2..i 



I..east daily range, 2 ; 7. 



Mil III id it If. 



Mean dew point, 20.9 



Mean force of vap'>r, I7.")3 



Mean relative luimidity 72.8 



}Viii<l. 



I'rcv.iiliiig Direct ions. 



North 24|ierrcnt. 



North West 17 " 



North North East, 1.3 " " 



North Kast 11 " 



Other directions, :{,i " " 



Total movement, 34.38m. 



Greatest ilaily movement, . . . 4flS ni., 27tli. 

 Least daily movement, 19m., 7tli. 



Mean daily movement 118..5ni. 



Mean hfiurly velocity, 4.9 m. 



Maximum i)ressure per square foot,ll^ll)s.= 

 48 m. per hour, 27th, at (i A. 



*frerijiitation. In inches. 



Total precipitation, 1.00:1.90 



IVeatlier. 



Mean cloudiness observed, . . . .i.) per cent. 



Number of clear days, 11 



Number of fair days, n 



Number of cloudy days, i;; 



Total cloudiness recorded by the .Sun Ther- 

 mometer, . . . 1G9 hours or .5.5 per cent. 



Number of days on which .01 Inch or more 

 rain or melted snow fell, 8 



Number of inches of snow on the ground at 



the close of the month, 1 inch. 



TiriffJit Sii iisJiiiie. 



Number of Hours recorded i;58 



Utiin. Ist, 8th. 20th. 



Siioir, 2d, -M, 7th, 1 1th, 12th, 14th, 1.5th, 20th, 

 21 St, 28th, 29th. 



Total fall in inches, 14. 



Ifnil, 1.5th. 



Aiirorti Kiirealis, KUh, 2;id, 2(ith. 



aicfin Ozone, 28 |)er cent. 



llaloK. 



.■«olar, 19th. 



Lunar, loMi. 



Corona, 4tli. 



Q<il ,of40 or more miles ))er hour. 44, NN.K. 

 2(>th; 48. N. N. E., 27tli. 



*Tlie first ligures denote readings ;tt to|) ol' tower, tlic sei-cmd at b.-ise. 



