BULLETIN No- 1 I. NOVEMBER, 1889. 



METEOROLOGICAL OBSERVATORY 



OK THK 



Hatch Expcriiiient Station 



MASSACHUSETTS AGRICULTURAL COLLEGE, 



Latitude, 42° 23' 48. o" N. Longitude, 72° 31' 10" W. 



Height of instruments above ground^ 51 ft. Above sea leveL 260 ft. 



MONTHLY SUMMARYn 



Hressure. lu inches. Actual niaxinmni reading 30.340 ; actual minimum reading 29.058; 

 Mean reduced to 32" F., 29.74-2; Monthly Range, 1.288. 



Air Temperature. In Degrees Fahrenheit. Hi^liest, at top of tower, .58.0°; at base of 

 tower, 67.0"; Lowest, at top of tower, 18.0''; at basf <>1' lower, 16.0"; Mean, 41.0''; Monthly 

 Range, 40.0>^; Highest Mean Daily, .54.2"; Lowest Mean Daily, 26.,5"; Mean Maximum, 48.9"; 

 Mean .Minimum, 33.9"; Mean Daily Range, 14.7"; Greatest Daily Range, 25.0". 



Hii iniiiiti/. Mean Dew Point, 38.3" ; Mean Force of Vapor, .3188 ; Mean Relative Humid- 

 ity, 75.4. 



»'(«</. Prevailing Direction, S. W.; Total IMovement, 2.589 miles; Greatest Daily 

 Movement, 238 miles, 3rd; Least Dailv Movement, 5 miles, 18th; Mean Daily Move- 

 ment, 86.4 miles, Mean Hourly Velocity, 3.6 miles; Maximum Pressure per Square Foot 

 14 1-2 lbs. =.54 m. per hour, 3rd, at 2 a. m. 



Precipitation. In inches. Total Precipitation, 4.99 in. ; at base of tower 6.04 in. 



Wiather. Mean Cloudiness observed, 68.0 per cent ; Number of Clear Days, 6 ; Number 

 of Cloudy Davs, 20; Number of Fair Davs, 4; Total Cloudiness recorded by the Sun 

 Tliermometer,"216 hrs, or 70.0 per cent. Number of days on which .01 inches or more rain 

 fell, 12. 



JBrif/lit SiinsJiine. Number of Hours Recorded, 84. 



Stioir, 27th and 30th. 



Frost, 4th, Gth, 7th, 11th, 17th, ISth, 26th, and 29th. 

 - Sleet, 27th. 



DAILY SUMMAI^Y. 



Oct. 1. Barometer rednced to 32° F., max. 29.91^, min. 29.86t;, mean 29.878- 



^Temperature, max. 53'-', 54", 2 p.m., min. 42°, 41«, 1 a. m., mean hourly 4fi.8°. 



Sun Thermometer, max. 76", 10 a.m., bright sunshine 0. 



Mean dew point 44.0°, mean force vapor .3322, mean humidity 87.7. 



Wind, N., total movement, 8 m., mean hourly velocity 0.3. m., max. pres- 

 sure, 0. Light rain from a. m. to 12 m., .02 in. water fell. Ozone 2. 



2. Barometer reduced to 32° F., max. 29.923, min. 29.621, mean 29.873. 

 Temperatnre, max. 55.5°, 56°, 12 p.m., min. 41.5°, 40.5°, 4 a.m., meanhrly 49.8'". 

 Sun Thermometer, max. 69°, 1 p.m., bright snnshine 0. 



Mean dew point 46.3°, mean force vapor .3686, mean humidity 86.7. 



Wind, S.S.W., total movement 45 m., mean hourly vel. 1.9 m., max. pressure 



1 1-2 lbs. =17 m. per hour, 11.30 p. M. Showers from 12 m. to 12 p.m., .22 



in. water fell; at base of tower .45 in. Ozone 1. 



3. Barometer reduced to 32° F., max. 29.689, min. 29.430, mean 29.521. 

 Temperature, max. 63°, 63°, 4 a. m., min. 46°, 44°, 12 p. m.. mean hourly 54.2°. 

 Sun Thermometer, max. (^G'', 7.30a. m., bright sunshine 0. 



Mean dew point 50.7°, mean force vapor .4312, mean humidity 88.7. 



Wind, S. W., total movement 238 m., mean hourly vel. 9.9 m., max. pres- 

 sure 14 1-2 lbs. =54 m. per hour, 2 a.m. Showers from a.m. to 7 p.m., .42 

 in. water fell. Ozone 7. 

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



