TORNADOES. 171 



A ess than a single foot for the whole length of the seven 

 and a half miles. 



Equally remarkable and extensive were the labors 

 connected with the preparatory works. New and solid 

 roads, bridges, canals, magazines, workshops, forges, 

 furnaces, and machinery, had to be constructed ; resi- 

 dences had to be built for the men, and offices for the 

 engineers ; in fact, at each extremity of the tunnel a 

 complete establishment had to be formed. Those who 

 have traversed Mont Cenis since the works began have 

 been perplexed by the strange appearance and charac- 

 ter of the machinery and establishments to be seen at 

 Modane and Fourneau. The mass of pipes and tubes, 

 tanks, reservoirs, and'machinery, which would be mar- 

 vellous anywhere, has a still stranger look in a wild 

 and rugged Alpine pass. 



(From the Daily News.) 



TORNADOES. 



THE inhabitants of the earth are subjected to agen- 

 cies which beneficial doubtless in the long-run, perhaps 

 necessary to the very existence of terrestrial races 

 appear, at first sight, energetically destructive. Such 

 are in order of destructiveness the hurricane, the 

 earthquake, the volcano, and the thunder-storm. "When 

 we read of earthquakes such as those which overthrew 

 Lisbon, Callao, and Riobamba, and learn that one 



