negative binding posts.

28. Q. Should the copper electrode and holder become fused until no
longer serviceable while on the road, what would you do?

A. Would remove the damaged holder from the lamp and substitute either
an iron bolt of sufficient length or a carbon, securing the improvised
electrode in the bracket of lamp same as the electrode holder is held,
only being sure that the end of the bolt or carbon comes up into the
center of the reflector and did not rest on the base of reflector or
lamp.

29. Q. What is the difference between a series wound equipment and a
compound wound equipment, and what advantages are obtained from the use
of the compound equipment.

A. With the series wound equipment, the incandescent cab lights burn
only with the arc lamp, while with the compound machine the incandescent
lamps are independent of the arc and can be used as desired.

30. Q. If you were running along with your light burning steadily and
nicely, then suddenly the light began to flash badly and kept it up,
where would you look for the trouble?

A. Trouble would usually be found at one of the binding posts, where one
of the binding post screws would be found loose.

31. Q. If you were running along with light burning satisfactorily and
suddenly it went out, where would you be likely to find the trouble?