668 



PROTECTION AGAINST LIGHTNING. 



planted along 100 metres of roadway. No injury was done to 

 the living plants, but all the supports were struck and split, 

 the lightning passing through the ground from one post to 

 the other. 



1895 (10th June) : At Bockling, in Graf Schulenburg's 

 forest, lightning set fire to a crop of 15-year-old silver-fir, 

 the fire extending over about sixty acres. 





*mx3k 



*.''.&:. .*' 



Fig. 293. Oak tree struck by lightning, St. Amand, near Valenciennes, 

 23rd July, 1896. 



