METEOROLOGICAL OBSERVATORY 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



LatitiKle. 42° 23' 4S.;V' N. Longitude, 72° 31' 10" W. 



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



BULLETIN No 64. 



APRIL, 1894. 



MONTHLY SUMMARY. 



fressiti-e. In indies. 



Actual niaxiinuni ruailing, . ,'}0.'23, 30th, 8 a. 

 Actual niiniumin ryailinj?, . . JH.IST, Jst, 3 a. 



Mean reduced to sc;i level 30.054 



-Monthly range, 86 



*Air Tf III pr rat lire. In Degrees Fahr. 



Highest, 7V;79. ;27tli 



Lowest, 23.; 16, Srd 



Mean, 47.9; 4«.7. 



•Monthlv Range ■'i'i. ; 63. 



Highest mean daily 61. 4:. 16. 



Lowest mean daily 35.4; 3L3 



Mean maximum, .55.8; .58.2 



Mean minimum, 40.2; 35.2 



Mean ilaily range 15.7; 23.1 



Greatest daily range, 32. ; 41. 



Least daily range, 3. ; 6.51 



Huniiditj/. 



Mean dew point 34.2 



Mean force of vapor, 3742 



Mean relative humidity, (iO.5 



Uititl. 



Prevailing Directions. 



North 20 per cent. 



South West, 14 " " 



South 12 " " 



.Sout.li South West, 9 " " 



Other directions 45 " " 



Total movement, 41"5 m. 



Greatest daily movement, . . . 443 m., 13th. 

 Least daily movement 28 m.; 28th. 



Mean daily movement 136.8 m' 



Mean hourly velocity 5.7 ni' 



Maximum pressure per square foot, 15^ lbs.= 

 5iini. per hour, 13th, at 4-30 v. 



*frecipitntion. In inches. 

 Total precipitation, 85; 1.83 



Weather. 



Mean cloudiness observed, . . 53.4 per cent. 



Number of clear days 11 



Number of fair days, 2 



Number of cloudy days, 17 



Total cloudiness recorded by the Sun Ther- 

 mometer, . . . 228 hours or 56.7 per cent. 

 Number of days on which .01 inch or more 



rain or melted snow fell, 12 



Number of inches of snow on the ground at 



the close of the month, . 



Frost, 7th, 10th, Kith, 17th. 



Bright Sunshine, 



Number of Hours recorded, 174 



K«m, . . lst,4th,(ith, 12th, 13th, 19th,20th,21st, 

 22nil, 24 th, 27th ,28th. 



Rainbow, 2Ist, 24th. 



Snow 6th,7th,sth, nth, 12th. 



Total fall in inches, 6 



Thunder and I^iyhtning, . . 27th, 28th. 



Mean Ozone, 22 per cent. 



I fed OS. 



.Solar, 1st, 16th, 30th. 



Lunar, 16th, 18th. 



Qah's, of 35 or more miles per hour, 47, let, 

 W.: 42, 9th, N. ;49, 11th, N.N.E.; 48,12th 

 N.N.E ; .-.6, 13th,N.E.; 42, 14th, N.N.E. ; 

 85,26th, W.; 45, 29th, N 



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



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