664 MODERN STEAM PRACTICE . place when the fire box is thoroughly heated , and vice versa . The stays in some instances have been turned down at the middle of their length , thus securing some lateral strain without permanent … The plates of the fire box are flanged as in British practice with a separate crown plate , which is at times flanged downwards on two sides , while in others the side plates are bent , and are of sufficient length to form the crown , the seam of rivets being in the centre of the fire box . The…
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