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FILLING ROOTS. 285
dating the gold to the side of the cavity. Thus, the
blocks are successively introduced and consolidated,
till the canal is filled. It is better so to arrange as to
introduce the last portion of gold near the center of
the canal, rather than at the side. ' The last blocks
introduced should be stiff and dense, that they may
be thrust in with considerable force. The method of
filling canals at present employed by many, is in the
use of the filling instruments invented by Dr. C.
Palmer, represented in Fig. 55. There is a variety
Fig. 55.
in size and somewhat in form, so that in all positions
they will readily enter the canals and effectually con-
solidate the gold, which is introduced in small cone-
shaped pellets, loosely rolled, so that they may be
*
thoroughly consolidated.
Another method of preparing gold for filling roots
is, to take the pure metal, and roll it down, on a