LIGHT SCIENCE 

 FOE LEISURE HOUES 



STRANGE DISCOVERIES RESPECTING 



THE AURORA. 

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ONE of the most mysterious and beautiful of Nature's 

 manifestations promises soon to disclose its secret. The 

 brilliant streamers of coloured light which wave at 

 certain seasons over the heavens have long since been 

 recognised as among the most singular and impressive 

 of all the phenomena which the skies present to our 

 view. There is something surpassingly beautiful in 

 the appearance of the true ( auroral curtain.' Fringed 

 with coloured streamers, it waves to and fro as though 

 shaken by some unseen hand. Then from end to end 

 there pass a succession of undulations, the folds of 

 the curtain inter wrapping and forming a series of 

 graceful curves. Suddenly, and as by magic, there 

 succeeds a perfect stillness, as though the unseen 

 power which had been displaying the varied beauties 

 of the auroral curtain were resting for a moment. But 

 even while the motion of the curtain is stilled we see 



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