d, but it may be enclosed in a metal
shield if desired. This bath may be placed in one of three
positions--(1) in the shampooing room, (2) in a separate chamber, (3) in
the plunge bath chamber. It is most conveniently placed where the bather
passes it _en route_ from the washing room to the plunge. For this
appliance a good head of water is absolutely essential, as with a low
pressure it is very ineffective. The illustration shows the bath
standing on iron shoes. If fixed in a corner, as ordinarily, it can be
secured to the wall by such cramps or brackets as may be necessary.

[Illustration: FIG. 15.

Spray, Wave, and Douche Baths.]

Besides the needle and shower, as above, the tonic bathing appliances
may include an ordinary horizontal douche that can be pointed in any
direction, a spray, or large rose, and a "wave." These three appliances
may be placed together as at Fig. 15. They are connected to the pipes
from the regulating valves by means of a foot or so of flexible hose. To
this is secured a tapering copper pipe. The douche has a gunmetal
nozzle. It is directed against the back and spine, but must not be used
upon the head or chest. With a good head of water this is a most
powerful appliance, feeling more like a rod of some solid substance
pressing against one than a stream of water. The "wave" is formed by a
copper spreader. The spray is simply a large rose, 6 in. or 8 in.
diameter.

[Illustration: FIG. 16.

Regulating Valves for Needle, Douche, &c.]

It may be found convenient to arrange the valves for the whole of the
above-mentioned appliances together, as at Fig. 16. Each pair of hot and
cold handles are here brought together. These handles should be long, so
as to admit of easy regulating of the temperature of the water; they
may well be 9 in. in length. The douche, wave, and spray should be kept
as close as possible to the handles that regulate their temperature.

I would repeat the caution that it is very necessary to beware of
complications in these water-fittings and appliances. Some of the more
"fussy" contrivances--as, for example, the elaborated needle bath as
above described--require so much regulating, and so many valves and
stop-cocks, that it is quite an undertaking for the attendant to set
them going. Simplicity in design and construction should be observed in
this work: the pipes as few as need be; the valves as simple as
possible; and the whole put together in a manner that will permit