66 CHEMICAL ACTION. 



air; and then each fire will be so well 

 supplied, that neither will need to 

 borrow from the other. 



Q. Why do VESTRY CHIMNEYS so often 

 SMOKE? 



A. Because the wind (striking against 

 the steeple) is reflected back; and tumbles 

 down the vestry chimney, forcing the 

 smoke into the room. 



Q. WHAT WINDS make vestry chimneys 

 smoke ? 



A. Those from the north-east or 

 south-east; according to the position of 

 the vestry. 



Q. Why will the EASTERN winds make 

 VESTRIES SMOKE, more than those from the west ? 



A. Because they strike against the 

 steeple, and bound back to the vestry 

 chimney : but western winds cannot 

 rebound over the roof of a church. 



(N. B. The steeple of a church is always due west, and the 

 other end of the church due east; if, therefore, a western 

 wind rebound, it would rebound to the west, or away from 

 the church, and not towards it) 



Q. Why does a HOUSE in a VALLEY very 

 often SMOKE ? 



A. Because the wind (striking against 



