17 



character of the foundations and the process by which they 

 were laid. He showed that every test to provide for resistance 

 to wind pressure was being applied. The main span is sup- 

 ported by two huge piers — one at Inchgarney Island — each 

 pier being composed of four towers as large as four ordinary 

 martello towers rolled into one. Having described the plan 

 followed in the forming of the piers and the supports carrying 

 the girders, the Professor, in order to illustrate by a familiar 

 example the extraordinary dimensions of the bridge, supposed 

 an observer standing at the Methodist College looking at a 

 bridge extending to the military barracks in North Queen 

 Street, the rail-level being as high again as the Albert Memorial. 

 He also applied a map of the Boyne Viaduct to the map of the 

 Forth Bridge, and it was seen that the entire of the former 

 structure could be easily accommodated within the main span 

 of the latter. The cost of the new bridge will be about 

 £i, 600,000, and the work will probably be completed at the 

 end of two years from the present time. 



