142 EFFECTS OF HEAT. 



the sun, therefore a rainbow at night is 

 in the east, and indicates that bad 

 weather is leaving us. 



Q. Why does a RAINBOW in the EAST indicate 

 that bad weather is LEAYING us ? 



A. As west and south-west winds 

 bring rain, if the clouds have been 

 driven from the west to the east, they 

 have passed over us, and are going away 

 from us. 



Q. What is meant by an AURORA BOREA'LIS, 

 or northern light ? 



A. A luminous white cloud in the 

 north of the sky at night-time. Some- 

 times streaks of blue, purple, and red, 

 and sometimes flashes of light, are seen 

 also. 



In our island this phenomenon generally rises from a 

 dark cloud (running from the north to the east and west) 

 elevated about 10 or 20 degrees above the horizon: above 

 this dark bed of clouds the luminous white light appears. 



Q. What is the CAUSE of the AURORA 

 BOREALIS, or northern light? 



A. Electricity in the clouds. 



Q. Why is the AURORA BOREALIS generally a 

 WHITE light ? 



A. Because the electric fluid passes 



