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i'lLLING TEETH 51

as soon as the cylinder or roll is thick enough,
various sized rolls are easily made. Cut the roll
into short pieces of the desired lengths with sharp
scissors. The scissors will compress the ends some-
what, and produce blocks rather than cylinders.
A little gentle squeezing and rolling with the fingers
will bring them back to the cylinder form, although
as blocks they will work satisfactorily. Some of
the best non-cohesive fillings of the past were made
by operators who confined themselves solely to tape.
For general purposes it will be found that pellets, or
short lengths cut from a rope of suitable thickness,
answer all requirements, and are perhaps easier to
use than other forms of non-cohesive gold. When
large pellets are needed, two or three or more sheets
of No. 4 or No. 5 foil may be placed on one another,
and then rolled or twisted into a rope, and cut up
into pellets, or short lengths, as desired. Some of
the details of filling cavities will be considered
later.
Annealing Gold.—Annealing can be done either
with the naked flame of a spirit-lamp, or by placing
the gold on a thin sheet of platinum or mica, and
holding it over the flame. The electric annealer,
although extremely satisfactory, and theoretically
the only perfect annealer, is by no means a neces-
sity, and the statements that have been made, t^hat