intermittent flame, and with a larger addition of the acid
becomes spontaneously enameline on cooling.

in the reducing flame.

As in the oxidizing flame.

Behavior with Mic. Salt on Platinum wire

in the oxidizing flame.

Dissolves readily to a clear glass, which, when it contains a
large proportion of the acid, is yellow while warm, but becomes
colorless on cooling.

in the reducing flame.

The glass obtained in the oxidizing flame undergoes no change,
nor does it, according to _H. Rose_, alter by the addition of
sulphate of iron.

* * * * *

26. Niobic Acid, Ni^{2}O{3}

Behavior with Borax on Platinum wire

in the oxidizing flame.

Behaves in a similar manner to tantalic acid, but the glass