London's Pulse: Medical Officer of Health reports 1848-1972

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Rotherhithe 1898

[Report of the Medical Officer of Health for Rotherhithe]

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168
They will be built upon a foundation of cement concrete, faced with red pressed Tunbridge
Wells bricks; the whole of the internal parts exposed to a direct or radiated action
of flame being lined with special fire bricks laid on and jointed in pure fire clay.
The engine will be of the horizontal type, capable of indicating 20 h.p., fixed upon
a strong cast iron bed plate.
The cylinder, cast with valve chest, in one piece. The piston will have spring rings and
steel piston rod.
The whole of the bearings will be of gun metal.
The fan will be of the high pressure type, fitted with steel shaft and disc of wrought
iron.
There will be two boilers of the water tube type, each with 735 square feet of heatingsurface.
The working pressure will be 120 lbs. to the square inch. The tubes will be lapwelded
of the best wrought iron, having hand-holes for cleaning opposite each end, and
the steam and water drums will be of best mild steel plate. They will be supported
on wrought iron columns by expansion bars to overhead wrought iron girders. The
fronts will be ornamental above the combustion chamber of the furnace, with a large
door giving access to the tubes for cleaning. The tube sections and mud drums have been
tested by me at the makers' works by hydraulic pressure of 300 lbs. to the square inch,
and the steam and water drums by the same pressure to 200 lbs. per square inch.
The completed boilers, when fixed, will be further tested to the same pressure.
Two feed tanks and one direct acting feed pump will be fixed to supply the boilers
with water. They will also be fitted with hand firing doors at the side for use if at any
time they are to be worked when refuse is not available.
The boiler fittings will be supplied by Messrs. J. Hopkinson and Co., of huddersfield.
The flue, which is 5 ft. high and 3 ft. wide, between the south end of the boilers and
the shaft was a portion of the contract for the buildings, and has been built entirely