322 BAROMETER, 



Q. What is the 4ra SPECIAL RULE in regard 

 to the barometer ? 



A. When the barometer stands 

 very low indeed, there is never much rain, 

 although a fine day will seldom occur 

 at such times. 



Q. What kind of WEATHER will it be when 

 the barometer is UNUSUALLY LOW ? 



A. There will be short heavy showers, 

 with sudden squalls of wind from the 

 west. 



Q. Why will there be VERY LITTLE RAIN if 

 the barometer be UNUSUALLY LOW ? 



A. Because the air must be very 

 warm, or very moist, or perhaps both. 



Q. Why will there be little or no rain, if the 

 AIR be very WARM ? 



A. If the air be very warm it will 

 have a tendency to imbibe more moisture, 

 and not to part with what it has. 



Q. Wliy will there be little or no rain if the 

 air be MOIST, and the barometer remains very LOW ? 



A. If the air be ever so moist, rain 

 will never fall till cold air has been 

 introduced to condense the vapour ; and 

 the moment that the cold air is intro- 

 duced, the barometer will rise. 



