tus into the stokery. So
much of the iron flue as is in the laconicum must be coated with
asbestos or some composition, or the heating will not be wholly by
firebrick. The junction of iron flue and heating apparatus is shown by a
cast-iron cap sliding over a projecting rim of fireclay, moulded into
the last quarry cover, similar to the way in which cast-iron mouthpieces
are fitted to retorts.

This heating apparatus is shown visible in the laconicum, but if thought
desirable it could be screened by a wall of glazed bricks--9 in. and
miss 4-1/2 in. The 4-1/2 by 3 in. holes can be arranged in diamond
patterns. This screen wall, however, cuts off a large quantity of
radiant heat.

The first flue past the actual furnace--shown with ordinary dead-plate,
raking fire-bars, ashpit, fire-door, and ashpit door for regulating
draught--has walls 4-1/2 in. thick; above, smaller bricks, 3 in. wide;
but in a larger apparatus, 9 in. and 4-1/2 in. respectively would be
required. The quarries between flues and air spaces are 24 in. by 24 in.
by 3 in., with rebated joints. Larger covers would be more liable to
crack at any provocation.

In addition to heating by means of furnaces, steam-heating may be
employed, if found, as in many cases it would be, convenient and
economical. The chief disadvantage of this method of heating Turkish
baths, is the constant danger, however slight, of bursting a pipe in
the heating coil, which, by immediately filling the highly-heated
atmosphere with vapour, might prove most disastrous to the occupants of
the hot rooms, who would be seriously scalded. Nevertheless, the
principle has been largely employed in the heating of the most recent
Turkish baths in Germany.

If adopted it may be either on the hot-air or radiating plan, as in
heating by means of furnaces. In the first method the fresh air is
introduced into a chamber containing a coil of steam-pipes, and passes
thence into the laconicum by a shaft or conduit, as in the case of air
heated by a stove. In the second method, steam radiators--compact
batteries of pipes--must be placed in recesses in the hot rooms, fresh
air being introduced over them. The steam-pipes employed should be of
the "small bore" type, about 5/8 inch internal diameter, and of wrought
iron or copper. In order to ensure as far as possible against the danger
of explosion, the system of pipes should be tested, when fixed, by
severe hydraulic pressure.

It is certainly a great adv