HIGH-SPEED ELECTKIC INTEEURBAN RAILWAYS. 321 



Perhaps the most remarkable of the Swiss railways is the Jungfrau 

 line, which runs for 1^ miles alono- the base of the mountain and then 

 ascends by means of a tunnel (j^r miles lon^" to an altitude of 13,435 

 feet. After leaving the terminal station, the passengers are raised a 

 further 210 feet by an elevator. The grade is 25 per cent along the 

 entire road, with the exception of a 2.2-mile section which has 07 per 

 cent grade. The rolling stock consists of live locomotives, ten pas- 

 senger cars, and two freight cars. The locomotives in reality form the 

 rear truck of the cars, but can only be used without the latter. Three 

 independent brakes insure safet}^ during the descent. The locomo- 

 tives are equipped with two 3-phase motors, having a normal capacity 

 of 25 horsepower each, and the speed is l:f miles. The forward motor 

 is coupled to a continuous-current dynamo, which serves to exite both 

 motors during the descent, thus turning them into generators. There 

 are but few days when the sunnnit presents a clear view of the sur- 

 rounding territor3% and the traffic is therefore concentrated in a very 

 short time, when the rush is very great, and at such time eight trains 

 per da}' operate. * * * 



[Mr. Gibson's paper concludes with a ])rief account of the Berlin- 

 Zossen experiments, which are treated in this report ])y the folio wing- 

 article Iw Doctor Gradenwitz.] 



