line; and that they will stop the tone properly when the key is
released.

Damper springs sometimes break. It is necessary to take out the damper
lever to put in a new one.

See that the spoons are in line and work properly. Press the
sustaining pedal down, and see if all the dampers are in line; if not,
bend the damper wires with the regulator until they line up perfectly.

11. _Damper Rod_.--When the sustaining pedal squeaks, look first to
the pedal, then to the wooden rods leading up to the damper rod. If
the trouble is found in any of these, or the springs, use sperm oil or
vaseline.

Catch hold of the damper rod at the left behind the action and work
it. If it squeaks, you will have to take out the action and oil the
swings where they are hinged to the main rail.


QUESTIONS ON LESSON V.

1. If you should find a key sticking, how would you determine the
cause?

2. Name all the defects to which the key is subject.

3. Describe the proper adjustment of bottom or capstan.

4. Give two causes of blocking.