70 



GENERAL SCIENCE 



If the wind shifts the opposite way, the change is called " back- 

 ing," indicating the approach of another storm. 



" When the wind veers against the sun, 

 Trust it not, for back 'twill run." 



Weather Forecast. 

 FOR FALLING BAROMETER 



Barometer 

 Reading. 



30.8-31 



30.5-30.8 



30.2-30.5 



Continued cool, warmer 

 and cloudy to-morrow. 



Fair and warmer, fol- 

 lowed by wind and rain. 



Storm brewing in the 

 direction of the wind. 

 29 . 9-30 . 2 Cloudy and warmer, fol- 

 lowed by unsettled. 

 29 . 6-29 . 9 Unsettled, increasing 



winds and warmer. 

 29.3-29.6 Clearing, slight squall, 

 fair and cooler to-morrow. 

 29 . 0-29 . 3 Clearing, with high wind, 

 accompanied by squalls 

 and cooler. 

 Stormy. 



28.7-29 

 28.4-28.7 



FOR RISING BAROMETER 



Southeast rains with high winds. 



Clear to-night, and continued cool 

 with moderate winds. 



Generally fair, probably cool to-day, 

 with variable winds. 



Fair, with brisk winds, which will 

 diminish. 



Fair, with fresh winds to-night and 

 to-morrow. 



High winds, with cool wave, pre- 

 ceded by squall. 



Clearing, with high winds and cool 

 wave. 



Increasing winds followed by colder 

 weather. 



Very stormy. 



EFFECT OF TEMPERATURE ON THE WEATHER 



BAROMETER RISING 



Below 30 F Cold wave. 



Between 30 and 40 F Freezing. 



Between 40 and 50 F Probable frost. 



Between 50 and 60 F Cooler. 



Above 60 F Warm with cool nights. 



BAROMETER FALLING 



Below 30 F Snow storm. 



Between 30 and 40 F Rain or snow. 



Between 40 and 50 F Rain storm. 



Between 50 and 60 F Heavy rains. 



Above60F.. . Showers. 



