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72 INSTRUMENTS AND APPLIANCES

(2) The Engine or Mechanical (used on the dental engine),
its action depending on the rapid revolution of a disk with a

10 30 15 35
30 10 35 15
7 7 7 7 7 7
12 12 12 12 12 12
2 3 4 5 6 7
Fig. 90.—G. V. Black set of amalgam pluggers.

projection in its rim:

The Pneumatic (now almost obso-
(3)
lete), which is worked by the forcible pres-
sure of air from a bulb onto its piston; and
The (the most rapid and
(4) Electric
valuable), which is propelled by the electric
mto\
current.
3. Miscellaneous Instruments.—Instru-
ments of miscellaneous character not classi-
fied under either of the previous headings:

(a) Explorer (f) Clamp
(b) Broach Scissors
(g)
(c) Separator (h) Syringe
(d) Matrix (i) Mandrel
(e) Pliers

r| (a) Explorer.—Cavity Explorer—Canal

Explorer. A cavity explorer is a small, sharp-
III
Ill pointed instrument, made in various shapes