88 A PRIMER OF FORESTRY. 



light them at the wroug time or in the wrong place. 

 Still, there is no other means of fighting tires so power- 

 ful, and none so effective when rightly used. 



FIRE LINES. 



Fire lines— strips kept free from all inflammable 

 material by burning or otherwise— are very useful in 

 checking small tires and of great value as lines of defense 

 in fighting large ones. (See fig. 83.) They are also 

 very eft'ective in keeping fires out of the woods, as, for 

 example, along railroad tracks. But without men to 

 do the fighting they are of as little use against really 

 dangerous fires as forts without soldiers against invad- 

 ing armies. 



END OF PART I. 



