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_Substance_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ |
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1. ~Aluminum, Al_{2}O_{3}.~--Before the Bp. on Ch. Infusible. No change.

Before the Bp. on Ch. with Na_{2}CO_{3}. Forms an infusible compound
with slight intumescence.

In ignition tube with Na_{2}CO_{3} and Ch. No change. Moisture driven
off.

In flame on platinum wire. No change. Becomes incandescent.

In flame with borax bead. In O. F. dissolves slowly, forming a
colorless glass which remains so on cooling.

With Co(NO_{3})_{2}. Mass becomes blue upon re-ignition.

2. ~Antimony, Sb_{2}O_{3}.~--Before the Bp. on Ch. In O. F. volatilizes
without change. In R. F. is reduced and volatilized. White coating of
antimonious oxide deposited on Ch. Blue tinge imparted to flame.

Before the Bp. on Ch. with Na_{2}CO_{3}. Readily reduced. White brittle
bead. Very volatile, giving characteristic white coating.

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

In flame on platinum wire. Volatilized. Colors flame greenish blue.

With borax bead on platinum wire. In O. F. dissolves to a colorless
glass.

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

3. ~Arsenic, As_{2}O_{3}.~--Before the Bp. on Ch. Very volatile. Strong
garlic odor to fumes.

Before the Bp. on Ch. with Na_{2}CO_{3}. Reduced with emission of
arsenical fumes.

In ignition tube with Na_{2}CO_{3} and Ch. Volatilizes, forming a
mirror-like deposit of metallic As in the cooler part of tube.

In flame on platinum wire____

With borax bead on platinum wire____

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

4. ~Bismuth, Bi_{2}O_{3}.~--Before the Bp. on Ch. Yields a
coating--orange-yellow when hot, lemon-yellow when cold. The yellow
coating usually has a white outline.

Before the Bp. on Ch. with Na_{2}CO_{3}. Easily reduced to metallic
bismuth. Yellow bead brittle, but less so than antimony.

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 a
clear yellow glass, which becomes colorless when cold.

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

5. ~Cadmium, CdO.~--Before the Bp. on Ch. Gives a coating on the coal.
Reddish-brown when cold. Very volatile.

Before the Bp. on Ch. with Na_{2}CO_{3}. Readily reduced. The metal
volatilizes easily, giving the character