METEOROLOGICAL OBSERVATORY 



OF THE 



Hatch Experiment Station, 



MASSACHUSETTS AGRICULTORAL 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. 88. 



APRIL, 1896. 



MONTHLY SUMMARY. 



Pressure. In inches. 

 Actual maximum reading, . 30.2S, 8 a., 9tli 

 Actual minimum reading, . . 29.33, 3 P., 3rd 



Mean reduced to sea level 30.1()8 



Monthly range 0.9.J 



*Air Temperature. In Degrees Fahr. I 



Highest, 88.5; 88.5, 16th 



Lowest 22,21,3rd 



Mean, 49.2. 



Monthly Range 66.5; 67.5 



Highest mean daily, 68.7, 16th 



Lowest mean daily, . . .' 27.2, 3rd 



Mean maximum, 60.5; 60.7 



Mean minimum, 37.4; 36.0 



Mean daily range 23.1; 24.8 



Greatest daih' range, 43.5; 47.; 16th 



Least daily range 7.; 4 on 2nd 



Humidity. 



Mean dew point, 35.9 



Mean force of vapor, 416 



Mean relative humidity . . 62.0 



Wind. 



Prevailing Directions. 



South, 13 per cent. 



South West 10 " " 



West 13 " " 



South South West, 10 " " 



West South West 10 " " 



West North We.st 10 " " 



Other directions 34 " " 



Total movement 4674 m. 



Greatest daily movement, .... 412 m., 3d 



Least daily movement 59 m.; 9th 



Mean daily movement, 155.8 m. 



Mean hourly velocity 6.5 m. 



Maximum pressure per square foot, 18. lbs. 

 =60 m. per hour, 3d, 5 P. 



Precipitation. In inches. 



Total precipitation, 1.32 



Number of days on -whicli .01 inch or more 



rain or nieUed snow fell 4 



Snow total in inches 0.5 



Weather. 

 Mean cloudiness observed, ... 39 per cent. 

 Total cloudiness recorded by the Sun Ther- 

 mometer, . . . 145 hours or 36 per cent. 



Number of clear days, 16 



Number of fair days 6 



Number of cloudy days 8 



Bright Sunshine. 



Number of Hours recorded 258 or64!t 



Main, 1st, 2nd, 3d, 6ih, 7th, 17ih, 18th, 19th, 



2l8t, 22d. 

 Gales, of 35 or more miles per hour, 40, 2d, 

 W.N.VV\; 60, .3d, N.W.; 47, 4th, N.W.; 38, 

 17th, S.E.; 41,20th,N.W.; 46,23rd, W.N.W; 

 36, 28th.S.S.W. 



Snow, 1st, 2nd, 3d, 7th. 



liainbotv, 6th. 



Thunder and Lightning, . . . 17th, 19th. 



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



