METEOROLOOICAL OBSERVATORY 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



Latitude, 42° 23' 48.5" N. Lougitnde, 72° 31' 10" VV. 



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



BULLETIN No. 67. 



JULY, 1894. 



MONTHLY SUMMARY. 



Mean daily movement, 36.0 m. 



Mean lunirly velocity IT) m. 



Maxinnnn pressure per square foot, 9|lb8.= 

 44 m. per hour, 13th, at 1 P. M. 



* Precipitation. In inches. 

 Total precipitation, 99; 1.55 



I'ressiire. In inches. 



Actual nia.xiniuni reading, . 30.03, 27th, 7 a- 

 Actual minimum reading, . 2'.).48, 13th, 4 p. 



Mean reduced to sea level, 30.012 



Monthly range, 55 



*Air Teniperatufe, In Degrees Fahr. 



Highest, 97. ; 98. ; 20th 



Lowest 52., 9th;48., J3rd 



Mean 73.5; 72.9 



Monthly Range, 45.; .'>0. 



Highest mean daily 82.5; 84. ^t , ^ * ■ i - 



Lowest mean daily, 62.,^ 60.5 Number of lair days, .9 



Mean maximum, ^4 5. ^5.5 Number of cloudy days, .. . . . . . . 12 



Mean rnininuim 03.2 ■ 00.3 Total cloudiness recorded by the Sun Tlier- 



Wenther. 



Mean cloudiness observed, ... 50 per cent. 

 Number of clear days, 10 



Mean daily range 21.3; 25.3 



Greatest daily range, 30. ; 34. 



Least daily range 13. ; 14 



Htittiidity. 



Mean dew point, . 62.4 



Mean force of vapor S852 



Mean relative humidity, 68.2 



Wind. 



Prevailing Directions. 



South West, 22 percent. 



.South 22 " " 



West 13 " " 



South East 12 " " 



Other directions . . . . 31 " " 



Total movement 1109 m. 



Greatest daily movement, . . . 130 m., ].3th. 

 Least daily niovement, 2 m.; 16th. 



monieter, . . . 225 hours or 50 per cent. 

 Number of days on which .01 inch or more 

 rain fell, 12 



Bright Sunshine. 



Number of Hours recorded, 237 



Rain, . . 3rd,4th, 6th, 8th, 12th, 14th, 15th, 16th, 



17th, 21St, 22nd, 24th, 2.5th, 29th. 



Hail, 25th. 



Thiinder and Lifflitning, 3rd,4th,6th,14th, 



16th, 17th, ISth, 21i5t, 25th, 29th. 



Rainhoif, 8th, 25th. 



Mean Ozone, 17 per cent. 



Ilalos. 



Lunar 22nd. 



Gales, of 35 or more miles per hour, 37, 4th, 



W.; .35, 6th, S.W; 44, i;ith, W ; 39,14th,N; 



40, 17th, E: 40, 21st, N. N. E. 



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



