ld then be thoroughly saturated with paraffine
oil, and left thus for about four days, when they should be wiped with a
clean dry rag. Prepared in this way when new, wood-letter resists the
effects of lye, petroleum, turpentine, and atmospheric changes.

HOW TO KEEP ROLLERS WHEN OUT OF USE.

It is a good plan, when rollers are to be kept out of use for any
particular time, to put them away with the ink on them. It protects their
surface from the hardening effects of the atmosphere, and causes them to
retain those properties which give them the much desired "tackiness." But
about half an hour before using them, remove the ink and see that they are
really in condition again.

PRESERVATIVE OF ROLLERS WHEN NOT IN USE.

The following preservative of rollers when not in use is often
applied:--Corrosive sublimate, 1 drachm; fine table salt, 2 ozs.; put
together in 1/2 gallon of soft water. It is allowed to stand 24 hours, and
is to be well shaken before using. Sponge the rollers with the mixture
after washing.

OILS FOR LUBRICATING ROLLER MOLDS.

Sperm and lard oils are the best for lubricating roller molds. If they are
properly used, no trouble will be experienced in drawing the rollers.

CARE OF ROLLERS IN THE SUMMER TIME.

In hot, sultry weather rollers will not need sponging, as some of the
materials used in their manufacture, having an affinity for moisture, will
absorb enough humidity from the atmosphere to keep the surface soft.
Indeed, too much moisture is absorbed in close and sultry weather. Cover
the rollers while not in use with tallow (in damp weather); this will
prevent the absorbtion of moisture and keep the roller dry. When starting
up put a little tallow on the distributor. This will prevent the rollers
from sticking, and keep them cool.

The safest thing for the pressman is to have on hand, as a reserve, a set
of old, hard rollers.

Remember, it is not dry, hot weather that causes trouble so much as it is
hot moist weather. When the weather is dry, soft rollers can be used, but
when dampness comes on, take out the soft and put in the old hard rollers
that have become rejuvenated by the absorption of moisture.

TO KEEP GREEN MOULD FROM ROLLERS.

Nothing destroys the surface of a roller so much as green mould. It takes
all the life out of them. Green mould results from a damp place and a
careless pressman, and is always a disgrace to all concerned.

TREATMENT OF OLD ROLLERS.

When r