Unfortunately the ICC resisted welded boilers until it was too late to "save" steam power. The McQueen book is very well detailed, although rather oddly laid out. You will be most impressed with the heroic efforts the CNR went to in terms of streamlining and elephant ears, to raise smoke exhaust out of engineers' eyes and passngers windows and ventilation. Not the stodgy old "gubmint" operation most would think.
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