r electrode, causing the light to dim down, or, if the
clutch should be used until the sharp edge that grips the carbon should
have become worn smooth or round, the same would occur.

21. Q. If the light burns satisfactorily while the engine is in motion,
but goes out when engine is stopped, where would you find the trouble?

A. This trouble is most always found to be caused by the tension spring
No. 93 being too weak, though if the dash-pot plunger has become
corroded until it sticks in the dash-pot, the light will act the same as
if the tension spring were too weak.

22. Q. If the dash-pot should be found stuck, would you put oil in it?

A. Coal oil could be used to clean and cut the dirt out of the pot and
from off the plunger, but after the dash-pot and plunger have been
cleaned, all oil must be wiped off, for oil would cause the plunger to
stick as well as collect dirt.

23. Q. If the carbon of lamp should "jig or pound", what can be done to
stop it?

A. If the carbons pound the electrode, it is evidence that the iron
armature No. 64 may be too far out of the solenoid, or the speed of the
turbine engine may be too slow. This trouble can be remedied by adding
another link to the suspension link, which has one end connected to the
magnet yoke, the other end being connected to the iron armature No. 64.
If, however, when the arc is formed, it is found that the bottom end of
iron armature No. 64 measures one-half inch from bottom of solenoid, the
pounding is caused by the speed of turbine engine being too slow.

24. Q. If the copper electrode was fusing, how would you know it?

A. When the copper electrode is fused, a green light is always given
off.

25. Q. What should be done when a green light is seen?

A. Immediately close off on the steam throttle until a white light
re-appears.

26. Q. What is the cause of the fusing of the copper electrode?

A. Usually too high speed of the armature, although should you connect
the wires up wrong that the current flowing from the dynamo to the lamp
should enter the lamp at the electrode instead of passing through the
carbon first, you would get a green light and fuse the electrode.

27. Q. What arrangements have been made so that you cannot connect the
wires wrong?

A. The positive binding posts, both at the dynamo and the lamp, have
been provided with a much larger hole to receive the wire than has been
made in the negative binding posts, and the ends of the posi