sentences:  This boiler was also built by Babcock & Wilcox and was a single drum cross type water tube boiler and ran at a steam pressure of with a capacity of of steam per hour and was fed by a single chain grate stoker.By 1938 the load on the power station had increased to the stage where a third generator set was required.An order was placed with British-Thomson Houston for a 3.222 MW turbo alternator which was then numbered No.3 and was placed into service in March 1939.