children, and in nurses, waiters, policemen and others whose feet
grow tired from much standing. Exercises on tip-toe, especially with a
skipping rope, massage, rest and tonic treatment will give relief, and
shoes or boots may be supplied with the heel and sole thickened along
the inner borders so that the weight may be received along the strong
outer border of the foot. When the flat-footed individual stands it
should be upon the outer borders of his feet, or better still, when
convenient, on tip-toe, as this posture strengthens those muscles of the
leg which run into the sole of the foot and hold up the bony arches. In
certain extreme cases the surgeon wrenches the splay feet into an
inverted position and fixes them in plaster of Paris, taking off the
casing every day for the purpose of massage and exercises.

Flat-foot is often associated with knock-knee in children and young
adults who are the subject of rickets.

_Morton's Disease._--In some cases of flat-foot the life of the
individual is made miserable by neuralgia at the root of the toes, which
comes on after much standing or walking, the distress being so great
that, almost regardless of propriety, he is compelled to take off his
boot. The condition is known as Morton's disease or _metatarsalgia_. The
pain is due to the nerves of the toes (which come from the sole of the
foot) being pressed upon by the rounded ends of the long bones of the
foot near the web of the toes. It does not generally yield to palliative
measures (though rest of the foot and a change to broad-toed, easy boots
may be helpful), and the only effectual remedy is resection of the head
of one of the metatarsal bones, after which relief is complete and
permanent.

For paralytic club-foot, in which distressing corns have been developed
over the unnatural prominences upon which the sufferer has been
accustomed to walk, the adoption of the most promising conservative
measures are usually disappointing, and relief and happiness may be
obtainable only after the performance of Syme's amputation through the
ankle-joint.

CLUE, or CLEW (O. Eng. _cluwe_), originally a ball of thread or wool,
the thread of life, which, according to the fable, the Fates spin for
every man. The ordinary figurative meaning, a piece of evidence leading
to discovery, or a sign pointing to the right track, is derived from the
story of Theseus, who was guided through the labyrinth by the ball of
thread held by Ariadne