210 STATE BOARD OP AGRICULTURE. 



^ PROTECTION OF WINDMILLS. 



Steel windmills on steel derricks need no protection as they are a 

 protection in themselves; but a steel mill on a wooden derrick should be 

 grounded with a heavy galvanized iron wire. 



In closing, a word may well be said about watching the condition of 

 the lightning system ; like everything else, it may get out of repairs, and 

 like everything else, the sooner repaired the better. One is apt to get 

 the idea that a lightning system once put up will last indefinitely. It 

 is as reasonable to apply such an idea to a windmill or pump as to 

 the lightning rods. 



