163 



29. 

 68. 

 68. 



Recapitulation. 

 Mean barometric pressure, in inches, 1837-92, 

 Mean temperature, June, July and August, 1836-62, 

 Mean temperatui'e, June, July and August, 1862-92, 

 Mean temperature, December, January and February, 



1836-G2, 



Mean temperature, December, January and February, 



1862-92, 



Mean temperatui'e, 1st period of 19 years, 1835-54, 

 Mean tempei'ature, 2d period of 19 years, 1854-73, 

 Mean temperature, 3d period of 19 years, 1873-92, 



Mean yearly temperature, 1836-92, 



Greatest annual rainfall, 1888, ..... 



Least annual rainfall, 1837, 



Mean annual rainfall, 1836-92, 



Amount of snow, 1840-57,923.7 inches; yearly average, 54 

 Amount of snow, 1857-74, 915.5 inches; yeai'ly avei'age, 55 

 Amount of snow, 1874-92,889.9 inches; yearly average, 49 



Amount of snow, 1840-92, 230, 



Average per year, 53 



Greatest depth recorded, 1875, 87 



Least depth recorded, 1877, 



Mean cloudiness observed, 1845-92, . . . .50 



741 

 26° F. 

 10° F. 



24.53° F 



25° F. 

 29° F. 

 48° F. 

 23° F. 

 ,00° F. 



04 inches. 

 70 inches. 



05 inches. 

 ,33 inches. 

 90 inches. 

 44 inches. 

 42 feet. 

 17 inches. 

 5 inches. 

 17 inches. 

 83 per ct. 



Since Jan. 1, 1892, a careful record of the daily forecasts, both 

 Washington and local, has been kept ; each day these forecasts 

 have been compared with the true state of the weather at Amherst, 

 and the percentages of correctness recorded and remarks made 

 upon those predictions that have proven failures or partial failures. 

 This feature of our work was desired, in order that a better knowl- 

 edge of the efficiency of the weather service might be obtained. 



The following table gives the percentages of forecasts which 

 were found to be correct for Amherst : — 



* Local 

 Forecast. 



Washington 

 Forecast. 



1892. 



January, 



February, 



March, 



April, 



May, 



June, 



July 



August 



September, 



October 



November, 



December, 



Total average for the year, 



Difference in favor of local. 



Per Cent. 

 93.3 

 93.1 

 100. 

 93.3 

 SO. 6 

 70. 

 88.8 

 96.7 

 96.3 

 93.6 

 96.6 

 90.5 



91.06 



Per Cent. 



87. 

 86.6 

 100. 

 80. 

 71. 

 83.3 

 87. 

 96.7 

 96.6 

 96.8 

 96.6 



1.86 per cent. 



* The term " local " indicates Boston forecasts. 



