William R. Watt wrote:

> The method as I memorized it is "postive-to-postive, negative-to-ground".
> Then start the engine of the car with the good battery before starting the
> car with the bad battery.

Specifically, the order I recall is dead battery positive to good
battery positive. Then good battery negative to ground AWAY from
the battery; ground is any metal part at least 8 inches from the
dead battery. The idea is that a spark when the circuit is
completed could potentially ignite any flammable gasses coming
from the battery.