it. Finally
the negative terminal of the last battery should be connected to the
negative wire from the Tungar.

Reverse connections on one battery is likely to damage the plates; and
reverse connections oil all the batteries will blow one or more fuses.

Operation

A Tungar is operated by means of a snap-switch in the upper left-hand
corner and a regulating switch in the center. Before starting the
apparatus, the regulating switch should be in the "low" position.

The Tungar is now ready to operate. Turn the snap-switch to the right
to the "On" position, and the bulb will light. Then turn the
regulating switch slowly to the right, and, as soon as the batteries
commence to charge, the needle on the ammeter will indicate the
charging current. This current may be adjusted to whatever value is
desired within the limits of the Tungar. The normal charging rate is
six amperes, but a current of as high as seven amperes may be obtained
without greatly reducing the life of the bulb. Higher charging rates
reduce its life to a considerable extent. Lower rates than normal (six
amperes) will increase the life of the bulb.

Turn the snap-switch to the "Off" position when the charging of one
battery or of all the batteries is completed; or when it is desired to
add more batteries to the line.

The Tungar should be operated only by the snap-switch and not by any
other external switch in either line or battery circuits.

When the snap-switch is turned, the batteries will be disconnected
from the supply line, and then they may be handled without danger of
shock.

Immediately after turning the snap-switch, move the regulating handle
back to the "Low" position. This prevents any damage to the bulb from
the dial switch being in an improper position for the number of
batteries next charged.

Troubles

If on turning on the alternating-current switch the bulb does not glow:

1. See whether the alternating-current supply is on.
2. Examine the supply line fuses. If these are blown, or are
defective, replace them with 15 ampere fuses for a 115-volt line or
with 10-ampere fuses for a 220-volt line.
3. Make sure that the bulb is screwed well into the socket.
4. Examine the contacts inside the socket. If they are tarnished or
dirty, clean them with sandpaper.
5. Try a new bulb, Cat. No. 189049. The old bulb may be defective.

If the bulb lights but no current shows on the ammeter:

1. Examine the connections to the