onnections at the starting switch, as described. Should a
section have suffered considerably from such lack of charge, its
voltage will probably have been lowered. With all connections made
tight and clean and with the liquid at the proper height in each cell,
this section may automatically receive a higher charge until it is
brought back to normal. This high charge results from the
comparatively low voltage of the section affected.

In case the car is equipped with such a battery, each section must
carry its proper fraction of the load and with lamps turned on or
other electrical devices in operation the flow from the several
sections must be the same for each one. An examination should be made
to see that no additional lamps, such as trouble lamps or body lamps,
have been attached on one side of the battery, also that the horn and
other accessories are so connected that they draw from all sections at
once.

Some starting systems have in the past not been designed carefully in
this respect, one section of the battery having longer cables attached
to it than the others. In such systems it is impossible for these
sections to receive as much charging current as others, even though
all connections and switches are in good condition. In other systems,
all the cells of the battery are in series, and therefore must receive
the same charging current, but have lighting wires attached to it at
intermediate points, thus dividing the battery into sections for the
lighting circuits. If the currents taken by these circuits are not
equal, the battery section supplying the heavier current will run down
faster than others. Fortunately, multiple section batteries are not
being used to any great extent at present, and troubles due to this
cause are disappearing.

The temperature of the electrolyte affects the specific gravity, since
heat causes the electrolyte to expand. If we take any battery or cell
and heat it, the electrolyte will expand and its specific gravity will
decrease, although the actual amount of acid is the same. The change
in specific gravity amounts to one point, approximately, for every
three degrees Fahrenheit. If the electrolyte has a gravity of 1.250 at
70 deg.F, and the temperature is raised to 73 deg.F, the specific gravity of
the battery will be 1.249. If the temperature is decreased to 67 deg.F,
the specific gravity will be 1.251. Since the change of temperature
does not change the actual amount of acid in the