DEVELOPMENT OF THE AMERICAN RAIL AND TRACK. 



669 



A few years after,* on much of the Stevens rail laid on the Camden 

 and Amboy Railroad, the rivets at the joints were discarded and the 

 bolt with the screw thread and nut, similar to that now used, was 

 adopted as the standard. (See Fig. -10.) 



Fig. 40. 

 Standard Track of the Camden and Amboy Railroad, ik:it. 



From a drawing in Ihe U S National Museum made from an engraving in "Engineering in North America" 



hy <;. Stevenson, London, 1837 



Pig 11 shows how this rail was used on a superstructure on the 

 piling through meadows and marshy ground. 



4*9'- 



"Mr 



Fig. 41. 



Track of the Camden and Amroy Railroad. Rails laid ok imi.im. 

 [•hrough Marshes, 1837. 



i a drawing in the U. S. National Mu 



* See Stevenson's Engineering in America, 1837. 



