Wighau— Improvements in Lighthouse Lights. 151 



enormonsly increased power we use burners such as that at which, 

 we have been looking to-night, their illuminating effect will be 

 absolutely doubled, and thus will be placed at the disposal of the 

 lightkeeper lights respectively five times and six times as powerful 

 as the flash of Tory Island, the largest in the world, respecting 

 the great power and distinctiveness of which, especially in thick 

 weather, the testimony of seamen has been of the most unequivocal 

 character. 



