Corrections of typos:

> The power [powder] in ABC fire extinguishers will settle to the bottom and
being [begin] to
> 'cake' over time. Power [powder] in this condition will not flow and is
useless for
> putting out a fire. The local shop that specializes in fire extinguishers
> recommends having them refilled every to [two] or three years to assure
that this
> does not happen. Take the fire extinguisher to such a shop (see the yellow
> pages) and ask them if it can be refilled. If it can not be refilled don't
> depend on it to put out a fire.
>
> Bill
>