CHAPTER XVIII. 



THE WEATHER. 

 I. Barometer Indications. 



Stationary barometer indicates continuance of the present 

 weather. 



Slowly rising barometer usually indicates fair weather. 



Slowly falling barometer indicates the approach of a severe 

 storm. One-fifth to one-third of an inch is sufficient fall to give 

 indications. 



Sudden rise of the barometer indicates the approach of a 

 storm or the breaking-up of an existing storm. 



Sudden fall of the barometer indicates high winds and prob- 

 able rain. 



When areas of low and high barometer are near together, 

 heavy gales may be expected. 



2. Popular Weather Signs. 



Long lines of clouds extending up the sky from a common 

 starting-point often foretell a storm from that quarter. 



When the fleecy or cirrus clouds settle down into horizontal 

 bars or ribs in the upper sky, wet and foul weather may be ex- 

 pected. This is the " mackerel sky." 



If contiguous clouds move in various directions, rain is likely 

 to follow soon. 



When small black clouds scud over an overcast sky, heavy 

 rain and bad weather may be expected. 



Cumulus clouds that preserve a well-rounded form and float 

 high in the air indicate fair weather. 



Anvil-shaped cumulus clouds usually indicate thunderstorms. 

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