CHAP. XVf. BULL BRIDGE. 335 



BOIL-BB1DGE. NEAK, AiiBERGATE. 



curious complication probably not existing. In order 

 to prevent the possibility of the waters of the canal 

 breaking in upon the works of the railroad, Mr. 

 Stephenson had an iron tank made, 150 feet long, of the 

 width of the canal, and exactly fitting the bottom. It 

 was brought to the spot in three pieces, which were 

 firmly welded together, and the trough was then floated 

 into its place and sunk ; the whole operation being 

 completed without in the least interfering with the 

 navigation of the canal. The railway works under- 

 neath were then proceeded with and finished. 



Another line of the same series, constructed by Mr. 

 Stephenson, was the York and North Midland, ex- 

 tending from Normanton a point on the Midland 

 Eailway to York ; but it was a line of easy formation, 

 traversing a comparatively level country. The inha- 

 bitants of Whitby, as well as York, were busy projecting 

 railways as early as 1832 ; and in the year following, 

 Whitby succeeded in obtaining a horse line of twenty- 



