I02 



SCIENCE. 



[Vol. XV. No. 367 



in which it is carried. This being the case, there is no 

 difficulty in moving the cars of these lines at a speed of three 

 or four miles an hour. 



rope. While this corrects the danger of slipping, it gives rise 

 to the objection that the buckets must be both loaded and 

 unloaded while moving, since they cannot be stopped without 



3LE1CHERT WIRE-ROPE TRAMWAY OF THE SPLIT ROCK CABLE ROAD COMPANY, SYRACUSE, N.Y. 



One of the advantages of these tramways over others consists 

 in their capability of surmounting any grade. 



In one system of single-icpe tramways, no grades in the rope 



stopping the whole line. In the system illustrated, both these 

 objections are obviated. Any grade can easily be surmounted, 

 provided the contour of the ground is such that the inclination 



BLEICHERT WIRE-EOPE TRAMWAY OF THE SPLIT ROCK CABLE ROAD COMPANY, SYRACUSE, N.Y. 



are permissible steeper than 1 in 3|. In fact, 1 in 4 is really 

 about the limit. On steeper grades there is danger of the load 

 slipping on the rope. To obviate this danger, another system 

 employs a clip which fastens the bucket permanently to the 



ol the carrying-cables is not steeper than 1 in 1. The inclination 

 of these cables does not necessarily follow the contour of the 

 ground in all cases. For instance: in crossing valleys and 

 streams this system permits the use of long single spans, 



