TELPHERAGE 



263 



speed of four miles per hour, which we contemplate ; secondly, 

 the addition of a swivel or bogie arm, such as is used in the 

 model before you ; thirdly, improvements in the belt connection. 

 Moreover, the machine requires strengthening in some places. 

 It will, however, be seen that none of these points touch the 

 essential features of the design, which might at once be adopted 

 in practice. Worked with motors of the Gramme type, the 

 additional gear would not be required. 



Before the belt locomotive had been completed it was neces- 

 sary to design a locomotive for the South American line, which I 

 have several times mentioned. I had, meanwhile, constructed 

 the model which is now before you ; and this little locomotive 





FIG. 13. 



in which the power is transmitted by ordinary spur-wheels, ran 

 so extremely well that I adopted the general arrangement for 

 the next example on a large scale. This arrangement is shown 

 in Figs. 12 and 13. The grip (C C and B B) is a third variety of 

 the right angle nest, simpler than that in the belt locomotive. 

 In this form also we have line contacts, and two paths for the 

 discs and rod. Where it is desired to drive from both sides, this 

 arrangement is less powerful than that in the belt locomotive. 

 In the South American locomotive I drive from one side only, 

 leaving the off-side roller free to revolve as it pleases. This 



