BULLETIN No. 6. JUNE, 1889. 



METEOROLOGICAL OBSERVATORY 



OF TIIK 



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. 



MONTHLY SUiVlMARY. 



Pressure, In Inches. Actual maximum reading 30.240; Mean reduced to .Si" F., 29.070; 

 Monthly Range, .991. 



'Air Tetnpernture. In Degrees Fahrenheit. Mean, 67.7"; Highest, 90.0^; Lowest, 46.0"; 

 Monthly Range, 44. 0«; Highest INIcan Dally, 77.0-^; Lowest Mean Daily, 5fi.oS; Mean Maxi- 

 mum, 7().0'^; Mean Minimum, .59.7'^; aiean Daily Range, 1.5.9S; Greatest Dally Range, 25.0*^. 



Humiditij. Mean Dew Point, 61.1'^; Mean Relative Humidity, 79.1'^; Mean Force of Va- 

 por, .707-2. 



Whul. Prevailing Direction, S.; Total Movement, 4056 miles; Greatest Daily Move- 

 ment, 4!^3 miles, Ist; Least Dally Movement, 28 miles, 24th; Mean Dally Movement, 

 135.8 miles. Mean Hourly Velocity, 5.6 miles ; Maximum Pressure per Square Foot, 11 1-2 lbs. 

 =47.9 m. per liour, 1st, at 7 a. m. ^ 



PreHpitation. In Inches. Total Precipitation, 5.01. 



Bright Sunshine. Number of Hours Recorded, 277. 



Weather. Mean Cloudiness, on a Scale of 10, 5.3; Number of Clear Days, 3. ; Number 

 of Cloudy Days, 7; Number of Fair Days, 20; Total Cloudiness recorded by the Sun 

 Thermometer, 173 hrs, or 38.6 per cent. 



Thunder and Lightning, 10th, 11th, l.'ith, 16th and 28th. 



Halo, Solar, 3d, 11-20 x. m. 



DAILY SUMMARY- 



.TrNE 1. Barometer reduced to 32° F., max. 2!). 707, min. 29.(:28, mean 20.671. 

 Temperature, max. 73'^, min. CA°, mean hourly C,8.7'^. 

 Sun Thermometer, max. 97°, 10 a. m., bri,<;ht sunshine 3 hrs. 

 Mean humidity 88.3°, mean force vapor .7001, mean dew point 65.3.° 

 Wind, S., total movement, 485 m., mean hourly velocity 20.2 



m., max. pressure, 11 1-2 lbs., 10 a. m. ozone 3, showers during 



day, 1.54 in. rain fell. 



2. Barometer reduced to 32° F. , max. 20.G87, min. 20.023, mean 20.656. 

 Temperature, raa.x. 74°, min. 63°, mean hourly 67.1°. 



Sun Thennometer, max. 93°, 12 m., l>ric;ht sunshine 5 hrs. 

 Mean humidity 83°, mean force vapor .6739, mean dew point 61.6°. 

 Wind, S. SW., total movement 183 m., mean hourly vel. 7.6 m., 

 max.pressilre 5 3-4 lbs., 2.15 p. M., Ozone 2. 



3. Barometer.reduced to 32° F. , max. 29.705, min. 29.580, mean 20.638. 

 Tcnfijerature, max. 75'', min. 60°, mean hourly 66.3°. 



■ Sun Thermometer, max. 107°, 12 M., briiiht sunshine 11 hrs. 

 Mean humidity 78.6°, mean force vapor .6697, mean dcAV point 59.6°. 

 Wind, S. SW., total movement 105 m., mean hourly vel. 4.3 m., 



max. pressure 1-2 lb, 2 p. m.. Ozone 3. 

 Solar halo about 11.20 a. m. 



4. Barometer reduced to 32° F. , max. 29.580, min. 29.282, mean 20.376. 

 Temperature, max. 73°, min. 50°, mean hourly 65°. 



Sun Thermometer, max. 94°, 12 m.. bright sunshine 7 hrs. 



