The alkaline metals appear to possess this property in a slight degree.

The electrolyte may consist of saturated solutions of soluble alkaline metals and earth.

Two oxides of the earthy alkaline metals, lime and hydrate of barytes, may also be used as accelerators.

The oxides of alkaline metals or their alkaline salts are not the only accelerators susceptible of being used in pyro development.

The normal salts of the alkaline metals, such as sodium chloride, potassium sulphate, sodium sulphate, etc., have no action whatever on the wool fibre.

This element, which belongs to the group of the alkaline metals, does not form coloured salts (a property only shown by the heavier metals).