istic coating.

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

In flame on platinum wire____

With borax bead. In O. F. dissolves to a clear yellowish bead, colorless
when cold.

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

6. ~Chromium, Cr_{2}O_{3}.~--Before the Bp. on Ch. No change.

Before the Bp. on Ch. with Na_{2}CO_{3}. Cannot be reduced. Soda sinks
in Ch. and a green colored mass remains.

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

In flame on platinum wire____

~With borax bead.~ Dissolves slowly but colors intensely. Yellow while
hot, green when cold.

With microcosmic salt bead. Colors red when hot, green when cold.

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

7. ~Cobalt, CoO.~--Before the Bp. on Ch. In O. F. unchanged. In R. F. is
reduced to the metal and is magnetic.

Before the Bp. on Ch. with Na_{2}CO_{3}. Reduced to a gray magnetic
mass.

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

In flame on platinum wire____

With borax bead on platinum wire. In O. F. colors very intensely blue,
both hot and cold.

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

8. ~Copper, CuO.~--Before the Bp. on Ch. Fuses to a black globule, which
can be reduced with some difficulty.

Before the Bp. on Ch. with Na_{2}CO_{3}. Readily reduced to metallic
bead, which is red in color, hard, malleable.

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

In flame on platinum wire. Colors flame emerald-green.

With borax bead on platinum wire. In O. F. green when hot, blue when
cold.

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

9. ~Iron, Fe_{2}O_{3}.~--Before the Bp. on Ch. In O. F. unchanged. In R.
F. becomes black and magnetic.

Before the Bp. on Ch. with Na_{2}CO_{3} Reduced to a metallic powder,
magnetic.

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

In flame on platinum wire____

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

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

10. ~Lead, PbO.~--Before the Bp. on Ch. Easily reduced to the metal, bead
very malleable. Coating yellow, surrounded by white ring.

Before the Bp. on Ch. with Na_{2}CO_{3}. Instantly reduced. Coats the
Ch. upon further blowing.

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

In flame on platinum wire. Tinges flame blue.

With borax bead on platinum wire. In O. F. dissolves easily, forming a
limpid glass.

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

11. ~Manganese, Mn_{2}O_{3}.~--Before the Bp. on Ch. At high temperature
turns red.

Before the Bp. on Ch. with Na_