Fig. 6. is the bed-room floor, or 66th course of the building, and is elevated 75 feet 8 inches above the foundation; it measures 11 feet 11½ inches in diameter, and over all 15 feet 6 inches; the walls are 9 feet in height. The windows, manhole, trap-ladder, doors, and oaken partition are similar to what have already been described in the floors below; a shews the position of the aperture for the cast-iron funnel leading from the kitchen-chimney through the several apartments to the cupola of the Light-house; b b the bed-frames, forming two bed-places in breadth, which are three tiers in height, reaching from the floor to the roof, and capable of accommodating six persons; c c lockers on each side of the beds, for the use of the four light-keepers.
Fig. 7. the next in order is the floor of the Strangers’-room or Library, being the 75th course of the building, which is 85 feet 11 inches above the foundation. The diameter of this floor is 12 feet, it measures 15 feet over walls, and the height of the roof, at the centre, is 11 feet 1 inch. The walls, windows, and other particulars of this apartment are nearly similar to those formerly described; a is the cast-iron funnel leading from the kitchen-chimney; b b the oaken framed book-case; c the tube through which the machinery-rope is conducted by the side of the walls of the several apartments, to the ceiling of the Provision-store.
Fig. 8. is the Light-room floor, or 86th course of the building, which is elevated 97 feet 9 inches above the foundation; within walls the floor measures 11 feet in diameter, over walls 13 feet 6 inches. The stones of the floor of this apartment, as will be observed, extend from the centre stone to the circumference of the balcony, varying from 7 feet to 7 feet 6 inches in length. The parapet-wall of the light-room, as will be seen from the Plate, has its outward face of an octagon form, but is worked circular within. In the several courses of the parapet, the principle of the zone or belt in the beds of the stones is still continued, and also the dove-tail of the end joints. The Light-room measures from the floor to the top of the stone work, or sole of the glazed sash-frames, 6 feet. a is the circular aperture for the cast-iron smoke-tube leading from the kitchen-chimney; b b is the manhole of this floor, having its landing towards the centre of the apartment, instead of being close to the wall, as in the several floors below. To have formed the length-way of the man-hole of this floor along the wall, would have occasioned the cutting of the stones in the dome-roof of the Library, in a manner hurtful to the strength of the building, which was conveniently avoided by introducing a platt in the ladder, instead of ascending more directly as by the trap-ladders of the floors below; c c is the case of the revolving-machinery, which gives motion to the Lights; d d is the drum or barrel, with its connecting wheels, on which the rope is coiled, from which the weight is suspended; e the position of the upright shaft for supporting the chandelier on which the reflectors are ranged, which is put in motion by its connecting train of machinery. The dotted lines marked f f shew the direction of the grooves cut in the floor for the horizontal shafts, which derive their motion from the machinery, and work the hammers of the two alarm-bells placed on the balcony; g g the bell-hammers with their cases; h h the bells, weighing each 5 cwt., which are tolled during the continuance of foggy or snowy weather; i i, &c. are the screwed batts of brass, forming the fixtures of the balcony-rail; k the Light-room door communicating with the balcony, which measures in the clear 5 feet in height, and 1 foot 10 inches in breadth.
Fig. 9. is a plan of the Lantern, showing the position of the trimming-path, and reflector-frame. The height from the foundation to the sill of the sash-frame is 102 feet 6 inches, and from thence to the lining of the cupola 13 feet four inches. a is the smoke-tube leading from the kitchen to the cupola; b b b b the cast-iron grated trimming-path, on which the light-keepers stand when they trim the lamps; c c the reflector-frame or chandelier, on which three tiers of reflectors are ranged; d the upright shaft; f f, &c. the position of the fountains for the reflector-burners, g g the position of the shades of red-coloured glass, by which the light is distinguished; h the iron trap-ladder communicating with the trimming-path.
Plate XIV.
MOVEABLE BEAM CRANE.
MOVEABLE BEAM CRANE &c.
Drawn by A. Slight
Engd. by A. Wilson
PLATE XIV.