epared in a machine invented by the doctor especially for
the purpose, and he gives directions for using as follows: "Cut the
material into strips running with the selvage, and fill as you would
with soft foil; use it in all surrounding walls, and finish with a
mallet burnisher. Where the surface comes to hard wear, weld on gold
with long, sharp serrated pluggers, and finish the same as with gold
fillings. The advantage over gold for cervical, buccal, and lingual
walls is the perfect ease with which it is adapted, and it can be
burnished so as to be absolutely impervious to moisture. Sharp,
coarse-serrated pluggers are particularly desirable when using hand
pressure." It comes in one-half-ounce boxes, filled with sheets less
than two inches square; the thin ones are used for filling, and the
thick ones make good linings for vulcanite.

This material is easy to manipulate, but great care is required in
condensing at cavity-margins, so as to make a tight filling, and also
not injure the margins. It makes as hard a surface as tin foil, and can
be cut, polished, and burnished so that it is smooth and looks well; it
can be used in temporary or chalky teeth, as a small amount of force
condenses it. By using a matrix proximal cavities can be filled from
one-fourth to one-half full, and the rest filled with gold, relying on
the form of the cavity to hold the gold, regardless of its connection
with the fibrous material. If the surface is not overmalleted so as to
make it brittle or powdery, a strip of No. 4 cohesive gold, of four or
five thicknesses, may be driven into it with a hand mallet and plugger
of medium serrations; this union is largely mechanical, but of
sufficient tenacity to make manipulation easy, as the material makes a
solid foundation to build upon. After exposure to the oral fluids,
electrolysis takes place at the junction of the metals.

In 1884 Dr. Brophy said, "I have used Robinson's material for two years,
and find it possesses good qualities, and can be used in deciduous
teeth, first permanent molars, and cervical margins with better results
than can be obtained with any other material by the majority of
operators."

Malleted with deeply serrated pluggers, it will make a filling which
will not leak. It has saved many teeth from caries at the cervical
margin where it might have recurred sooner had cohesive gold been used.
In the mouth it changes color about the same as tin foil, and a few
fillings did not