{2}CO_{3}. Is not reduced.

Before the Bp. in O. F. on platinum foil with Na_{2}CO_{3}. Transparent
green mass when hot. Opaque, bluish-green when cold.

In ignition tube with Na_{2}CO_{3} and Ch. Not reduced.

In flame on platinum wire____

With borax bead on platinum wire. In O. F. violet-red while hot,
amethyst-red when cold.

With Co(NO_{3})_{2}____

12. ~Mercury, HgO.~--Before the Bp. on Ch. Instantly reduced. Very
volatile.

Before the Bp. on Ch. with Na_{2}CO_{3}. Reduced and volatilized.

In ignition tube with Na_{2}CO_{3} and Ch. Sublimes condensing in the
upper part of the tube as a metallic ring which is seen with the lens to
consist of minute globules of mercury.

In flame on platinum wire____

With borax bead on platinum wire____

With Co(NO_{3})_{2}____

13. ~Nickel, NiO.~--Before the Bp. on Ch. In O. F. unchanged. In R. F.
reduced to metal, slightly magnetic.

Before the Bp. on Ch. with Na_{2}CO_{3}. Easily reduced to the metal.

In ignition tube with Na_{2}CO_{3} and Ch.____

In flame on platinum wire____

With borax bead on platinum wire. In O. F. violet while hot,
reddish-brown when cold.

With Co(NO_{3})_{2}____

14. ~Silver, AgO.~--Before the Bp. on Ch. Easily reduced to the metal.
White, malleable, hard bead. Coats the coal dark red near assay.

Before the Bp. on Ch. with Na_{2}CO_{3}. Instantly reduced to metallic
globule.

In ignition tube with Na_{2}CO_{3} and Ch. Reduced to the metal.

In flame on platinum wire____

With borax bead on platinum wire. In O. F. partially dissolved. Bead
becomes milk-white.

With Co(NO_{3})_{2}____

15. ~Tin, SnO_{2}.~--Before the Bp. on Ch. Coats the coal yellow while
hot, dirty white when cool. Not reduced.

Before the Bp. on Ch. with Na_{2}CO_{3}. Reduced to metallic tin. White,
hard, malleable bead. Coating white and close to assay.

In ignition tube with Na_{2}CO_{3} and Ch.____

In flame on platinum wire____

With borax bead on platinum wire. In O. F. small quantity dissolves to
limpid glass.

With Co(NO_{3})_{2}. Greenish-blue color.

16. ~Zinc, ZnO.~--Before the Bp. on Ch. Upon ignition becomes yellow. Is
not reduced.

Before the Bp. on Ch. with Na_{2}CO_{3}. Reduced to metal. Rapidly
volatilized, coating the coal white.

In ignition tube with Na_{2}CO_{3} and Ch.____

In flame on platinum wire____

With borax bead on platinum wire. In O. F. yellow while hot, limpid
glass when cold.

With Co(NO_{3})_