XIV 



BOARD OF AGRICULTURE. [Pub. Doc. 



Meteorological Observatory of the Hatch Experi- 

 ment Station (Massachusetts Agricultural Col- 

 lege), Amherst. 



[Latitude, 42° 23' 48.5" N. ; longitude, 72° 31' 10" W. Height of instruments above ground, 

 51 feet; above sea level, 273.5 feet.*] 



Annual Summary for 1896. 



Pressure (_in Inches'). 

 Maximum reduced to freezing, 30,60, Dec. 



27, 12 P.M. 

 Minimum reduced to freezing, 28.42, Feb. 6, 



11.30 p.m. 

 Maximum reduced to freezing and sea level, 



30.94, Dec. 27, 12 p.m. 

 Minimum reduced to freezing and sea level, 



28.72, Feb. 6, 11 30 p.m. 

 Mean reduced to freezing and sea level.f 

 Annual range, 2.22. 



Air Ternperature {in Degrees i^.)4 

 Highest, 97, Aug. 12. 

 Lowest, —14, Feb. 17. 

 Mean.* 



Mean of means of max. and min., 47.0. 

 Mean sensible (wet bulb) , 44. 

 Annual range. 111. 

 Highest mean daily, 81, May 10. 

 Lowest mean daily, — 1.7, Feb. 17. 

 Mean maximum, 57.3. 

 Mean minimum, 36.6. 

 Mean daily range, 20.7. 

 Greatest daily range, 47, April 16. 

 Least daily range, 3, Oct. 5. 



Humidity. 

 Mean dew point, 39.9. 

 Mean force of vapor, .422. 

 Mean relative humidity, 76.9. 



Wind, Prevailing Directions {Per Cent). 

 North, 10. 

 South, 10. 



South-south-west, 10. 

 West, 10. 

 South-west, 7. 

 Other directions, 53. 

 Total movement, 59,198 miles. 

 Greatest daily movement, 620 m., March 4. 

 Least daily movement, 14 m., Feb. 1. 

 Mean daily movement, 1R1.7 miles. 

 Mean hourly velocity, 6.7 miles. 

 Maximum pressure per square foot, 25 



pounds = 71 miles per hour on May 18, 



at 8 A.M. 



Precipitation {in Inches). 

 Total precipitation, rain or melted snow, 



39.66, 

 Number of days on which .01 inch or more 



rain or melted snow fell, 108. 

 Snow total in inches, 44. 



Weather, 

 Mean cloudiness observed, 49 per cent. 

 Total cloudiness recorded by sun thermom- 

 eter, 2,018 hours ^46 per cent. 

 Number of clear days, 132. 

 Number of fair daj-s, 102. 

 Number of cloudy days, 132. 



Bright Sunshine. 

 Number of hours recorded, 2,448 hours =54 

 per cent. 



Dates of Frosts. 



Last, May 1 ; May 20 in lowlands. 

 First, Sept. 24; Sept. 21 in lowlands. 



Dates of Snow. 

 Last, April 7. 

 First, Nov. 14. 

 Total days of sleighing, .31. 



Gales of 60 Miles per Hour. 



Jan. 1, 55 m., W. N. W.; Jan. 4, 52 m., N. 

 W.; Feb. 2, 50 m., AV. N. W.; Feb. 6, 

 61 m., N. E.; Feb. 7, 58 m., W. N. W.; 

 Feb. 11, 68 m., W. N. W. ; Feb. 14, 54 

 m., W.; Feb. 19, 70 m., W. S. W.; Feb. 

 24, 53 ra., W.; Feb. 29, 57 m., E. S. E.; 

 March 3, 61 m., N. N. W. ; March 4, 62 

 m., N. N. W.; March 5, 58 m., N.; 

 March 8, 56 m,, W. N. W.; March 9, 56 

 m., N. W. ; March 12, 59 m., W. ; March 

 20, 55 m., W. N. "W.; March 27, 52 m., 

 W. N. W.; April 3, 60 m., N. W.; May 

 18, 71 m., W. ; Aug. 26, 50 m., S. S. W. ; 

 Sept. 19, 57 m., S, W. ; Nov, 6, 55 m., W. 



LEONARD METCALF, Meteorologist. 

 JAMES L. BARTLETT, Observer. 



* Record divided, part ground shelter, part tower shelter. 



t See later bulletin. 



J Temperature in ground shelter. 



