BAROMETER. SNOW. 33 1 



In wet weather, if the mercury rises suddenly very high, 

 fine weather will not last long. 



N. B. The barometer rises highest of all for north and 

 east winds ; for all other winds it sinks. 



If the barometer be UNSETTLED. 



If the motion of the mercury be unsettled, expect unsettled 

 weather. 



If it stand at " MUCH RAIN" and rise to " CHANGEABLE," 

 expect fair weather of short continuance. 



If it stand at " FAIR" and fall to " CHANGEABLE," expect 

 foul weather. 



N. B. Its motion upwards indicates the approach of fine 

 weather: its motion downwards indicates the approach of 

 foul weather. 



CHAPTER XXIV. 

 SNOW. HAIL. RAIN. 



Q. What is SNOW? 



A. The condensed vapour of the air 

 frozen, and precipitated to the earth. 



Q. What is the CAUSE of SNOW ? 

 A. When the air is nearly saturated 

 with vapour, and condensed by a current 



