This will prevent an accumulation of moisture, which would otherwise pass off in steam, coming in contact with the buff, thus causing a dampness.

Another caution: never have the temperature of the air in the heater more than ten degrees above that which surrounds it.
When wheels are used, they should be encased in a sheet iron or wood case.

All those made for our market are provided in this respect.
Keeping Buffs in Order .-- This is one of the most important objects to arrest the attention of the operator.

Every buff is more or less liable to get out of order by dust falling upon or coming in contact with the polishing powder employed in cleaning the plate.

The edge of every plate should be thoroughly wiped and freed from any material that may adhere while cleaning.