METEOROLOGICAL OBSERVATORY 



OK THE 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



Latitude, 42° 23' 48.5" N. Lougitiide, 72° 31' 10" W. 



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



BULLETIN No. 92. 



AUGUST, 1896. 



MONTHLY SUMiVlARY. 



Fressiirr. In inches. 

 Actual niaxinuim reading, . . 30.11, C9tli, 7 a. 



Actual niin. reading •29..'52,'2iid, 8 A. 



Reduced maximum reading, 30.3!t, 2i)tli, 7 a. 

 Ke<hiced min. reading, .... 29.80, 2nd, cS v. 



Mean reduced to sea level 30.106 



Monthly range 0.59 



*Air Tetnperature, In Degrees Fahr. 



Highest, 97.0; 12th 



Lowest, 4.'.0; 20th,29lh 



Mean, 68.2 



Mean of means of max. and min., . . . .68.8 



Mean sensible(wet hull)), 64.5 



Monthly llange, .55.0 



Highest mean daily, 80.0, 10th 



Lowest mean daily, fje.S, 19th 



Mean maximum S0.5 



Mean minimum, 57.2 



Mean daily range, 23.3 



Greatest daily range, .H.5, 20th 



Least daily range 10.0,14th 



Hntnldit!/. 



Mean dew point, 61.7 



Mean force of vapor, 0.749 



Mean relative humidity 79.9 



JVind. 



Prevailing Direction, southwest. 



Summary. 



South, Southwest 23 per cent. 



.Southwest, 16 " " 



South, IG " " 



West South West, 10 " " 



Other directions, ....... 35 " " 



Total movement 2968 m. 



Greatest daily movement, . . . 183 m., 16th 



Least daily movement, 40 m., 12th 



Mean daily movement, 95.7 m. 



Mean hourly velocity, 4 m. 



Maximum pressure per square foot, 12.5 lbs. 

 =50 m. per hour, 26th, 1 1 30 A. M. 



Precipitation. In inches. 



Total precipitation 3.84 



Number of days on which .01 inch or more 

 rain fell, 11 



Weather. 



Mean cloudiness observed, ... 40 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, . . . 174 hours or 41 per cent. 



Number of clear days 13 



Numl)erof fair days 10 



Number of cloudy days 8 



Sright Sunshine. 

 Number of Hours recordeii, 2.54 hours or .59* 

 Rain, 1st, 2nd, .5th, Glh, 9th, 10th, 12th, 13th, 



14th, 16th, 18th, 21st, 22d, 23d, 27th, 3l8t. 

 Gales, of 35 or more miles per hour, .50 m., 



L6th, S.S.W. 

 Thunder and Liglittiiny, 2d, 5th, 6th, 7th, 



9lh. 10th, 12th, 11th. 



Temperature in ground shelter. 



