346 LIE STRAND
happen and assistance be required. room over the bedroom 1s called the watch or service room, and may be properly
SCRVICE ROOM
BELD ROOM
Low LIGHT RooM
LIVING RCOM
crANEL STORE ROCIH)
WINCH ROOM
CMNTYRANCE
. WATER TANKS
SECLION OF EDDYSTONE
LIGHTHOUSE.
regarded as the office of the establishment, for it contains official books and papers (in bookeases and on shelves), electric machines, calvanometers, and barometer, as well as spare \)umus and spare glass for Tantern, lamp cylinders, and various diagrams on the walls: around the room, deeply incised in the course of the ceiling, 1s the text from Psalm exxvii., adopted by Smeaton for his tower: * lixeept the Lord build the house they Tabour in vain that build it.” Considerable space is here devoted to the two pressure pumps for supply- ing oil to the lamps by means of weighted rams, which, being first raised by a pumping lever, dcsculd wmduallx into the oil, forcing it up the pipes into the llmps The chief work performed in the service room is at night, when the light 15 going and keeper is on duty.
The
MAGAZINI.
Surmounting the last flight of stars we cnter the most teresting compartment of all, namely, the lntern. Tt 1s 16t high, (4ft in diamcter, and eylindrical in form. The framings are ‘made of stecl, covered ex- ternally with gun-metal, and there s a very carcful arrangement for thorough ventilation, having regard to the great heat thrown off by the lamps. But the lighting apparatus s clearly the most important feature, the present system being the outcome of many costly cxperiments inoptical scicnee. The special kind of lamp in usc 1s known as a Douglass improved six-wick burier, that 15, one having six tubes of wick ol varying sizes, the larger cneircling the smaller, whichy when Lurning, produce a solid flame cqual to the itensity of z22 standard sperm candles. Two such hurners arc fitted, one above the other, within the revolving drums (now to be dcscnl)gd) so that 1n weather flashes of enormous intensity are sent forthy, the combined 1llu-
minating power bemg equivalent to a quarter about six thousand
of a nullion candles,
PRESSURE PUMP FOR SUPPLYING OITL TO LAJMPS.