alongside of the destructor, and is shoveled into a row of hoppers at
the head of the cells. These hoppers are in the middle of the width of
the destructor, and each communicates with a cell on each side of it.
The refuse is always damp, and often wet, and after being put into
the cells is gradually dried by the heat reflected upon it from the
firebrick arch of the cell, before it descends to the furnace. This
distinguishes the system from the common furnace, and enables the wet
material to be burned without other fuel. No fresh fuel is used after
the fires are once lighted. The vapor passes off with the gases of
combustion into a horizontal flue between the two rows of cells, through
an opening at the head of each cell, alongside that through which the
refuse is fed into it, the two openings being separated by a firebrick
wall. The refuse is prevented from falling into the flue by a bridge
wall across the outlet opening, over which the gases pass into the flue.

Between the destructor and the chimney a multitubular boiler is placed,
which makes steam enough for grinding into sand the clinkers which are
the solid residue of the burnt refuse. At Burmantofts an old chimney was
made use of, which is but 84 feet high; but at Armley Road a new chimney
was built, 6 feet square inside and 120 feet high. It is necessary to
make the horizontal flue large; that at Armley Road is 9 feet high and 4
feet wide. A large quantity of dust escapes from the cells--about 7 cwt.
a month--and unless the velocity of the air in the flue between the
destructor and the chimney were checked, the dust would be carried up
the chimney and might cause complaints; as, indeed, it has done with the
120-foot chimney, but whether with any substantial grounds is uncertain.
The dust is removed from the horizontal flue or dust chamber once a
month. Experience seems to indicate that there should be some sort of
guard or grating to prevent the entry into the chimney of charred paper
and similar light substances which do not fall to dust, and which are