METEOROLOGICAL OBSERVATORY 



OF THE 



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. 80. 



AUGUST, 1895. 



MONTHLY SUMMARY. 



I'i'essiii-e. In inches. 

 Actual niaxinuim reading, . . 30.00, 2-2il, 7 A. 

 Actual minimum reading, . . -29.49, 18th, 2 P. 



Mean reduced to soa level 3(i.01G 



Monthly range 0..t1 



*Air Temperature. In Degrees Fahr. 



Highest, 88, IGth ; 90, 24th 



Lowest 50, ^Ist; 38, 22d 



Mean, 70.4; 69.7 



Monthly Range, 38. ; 52. 



Highest mean daily 75.8; 78.5 



Lowest mean daily 60.4; .56.0 



Mean maximum S0.5; S1.9 



Mean minimum, 61. 0; 57.5 



Mean daily range 19.4; '24.4 



Greatest daily range, 27. ; 35. 



Least daily range, 7. ; 14. 



HiinUditi/. 



Mean dew point 60.4 



Mean force of vapor 77S0 



Mean relative humidity, . . 72.7 



Wind. 

 Prevailing Directions. 



South South West, 19 pc 



•South, 19 



West 13 



North West 13 



Other directions .'!G 



r cent. 



Total movement, 3397 m. 



Greatest daily movement, . . . 222 m., 7th 



Least ilaily movement 35 m.; 1.5th 



Mean daily movement 110 m. 



Mean hourly velocity, 4.6 m. 



Maximum pressure per square foot, SJ lbs.= 

 34 m. per hour, 18th, 4.30 A.M.; 21st,loA.M. 

 *Precipit(ition. In inches. 



Total pi'ecipitation 3.46 



Weatlter. 

 Mean cloudiness observed, . . 43.8 per cent. 



Number of clear days, 9 



Nuniberof fair days, II 



Number of cloudy days, 11 



Total cloudiness recorded by the Sun Ther- 

 mometer, . . .178 hours or 41.5 per cent. 

 Number of days on whi(;li .01 inch or more 



rain fell, 7 



Sright Siiiishine. 



Number of Hours recorded, 251 



Rain, 1st, 2d, 4th, 7th, 12th, 18th, 20th, 27th, 

 28th, 31st. 



Hail, 



Rninhoir, 



Thunder and Lightning, 4th, 12th, ISth, 

 31st. 



Solar Ifalo, 11th 



Mean Ozone, 20 per cent. 



Gales, of 35 or more miles per hour, none. 



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



