ng pin, pull it out and sandpaper or rub it with black lead
until it is found to work quite freely in the guide hole of the guide
board and the hole in the reed board.

Just under the reed board is a wooden slip covered with soft leather,
called the valve or pallet, which covers the openings in the reed
board which admit air to pass down through the reeds. The tracker pin,
pushed down by the key, opens the pallet which is held against the
reed board by a spring and kept in place by a guide pin at each end.
It sometimes happens that a pallet will be pushed down so far as to
catch on the guide pins and cause the tone to sound continually. In
other cases a piece of dirt will get in the way of the pallet and
prevent it from closing the opening. If this be the case, draw the
reeds that sound when this key is depressed and also a reed at each
side of it, and pump the bellows briskly, at the same time pressing
the three keys. This will generally create enough air to remove the
obstacle. If the key still sounds and cannot be made to "hush up" in
this way, you may be compelled to take out the entire action so that
you can get to the pallets, which can be done by removing all the
screws that hold the reed board in place. At the back, these screws
are on top of the board and sometimes they are on top in front; but
often they are under the air chamber in front. Be sure the screws are
all out before trying to pull the board loose, as you might crack the
board and thereby cause a leak. A moment's notice will reveal the
cause of the trouble in the pallet.

New pallet springs may be made of piano wire, using old springs for a
pattern.

LEAKS.

If a leak is found in the air boards, such as a crack or split, it can
be stopped permanently by gluing a piece of bellows cloth or any good
rubber cloth over the split. A leak in the bellows can be repaired in
the same way, but if it happens to be a hole at or near a part of the
cloth which is compelled to bend in the working of the bellows, you
will have to use some kind of rubber or leather cement, preferably the
latter. This can be made by dissolving gutta-percha in bisulphide of
carbon, but a good leather cement may be had at almost any shoe store.
If the bellows are porous, it may be well to give them a coat of
cement, but never paint them; the paint cracks and the leaks are made
worse.

PEDAL DETECTS.

Broken pedal straps are the most frequent annoyance. In all modern
organs t