to which all
plates of the group are attached. Block up the plate with thin boards
or wood separators until it is spaced the proper distance from the
adjacent plate. Care should be taken to see that the side and bottom
edge of the plate to be burned on is in line with the other plates of
the group. Proceed to burn on the plate by drawing a small blaze or
are and do not attempt to burn with just a glowing carbon. (Fig. 322.)

If only a glowing carbon is used the result will be a smeary mass and
in the majority of cases will not hold, due to the fact that it is not
welded but simply attached in one or two points.

The principle of lead burning is to weld or burn two parts into one
solid mass and not merely attach one to the other.

Keeping Wood Separators In Stock

No wood separators should be used except those furnished by the
Delco-Light Company. These should be kept in distilled water, to which
has been added 1.220 electrolyte in the proportion of one part to ten
parts of water. It is advisable whenever possible to use new
separators when making repairs on a cell. Separators which have been
in service are liable to be damaged by handling.

Freezing Temperature of Electrolyte

The freezing temperatures of electrolyte in the Delco-Light batteries
depends upon the specific gravity of the battery. The Delco-Light
battery fully charged, with a specific gravity of 1.220, should not
freeze above a temperature of 30 degrees below zero. Since, however,
the freezing point rises very rapidly with a decrease in specific
gravity, special care should be taken to keep batteries charged when
temperatures below zero are encountered. The following table shows
freezing temperatures of several different gravities of electrolyte.

Specific Gravity Freezing Point
---------------- --------------
1.100 19 deg. F. above zero.
1.150 5 deg. F. above zero.
1.175 6 deg. F. below zero.
1.200 16 deg. F. below zero.
1.220 31 deg. F. below zero.

At the temperature given, the electrolyte does not freeze solid, but
forms a slushy mass of crystals, which does not always result in jar
breakage.

Care of Cells in Stock

Frequently a Dealer or Distributor will have several sets of new
batteries in stock for five or six months. In this case, the cells
should be given a freshening charge before putting into service. This
charge should