Thallium Yellow

: ON THE PRIMARY, YELLOW.

The new metal thallium yields in combination with chromic acid two

yellow colours, a pale and an orange. They are not absolutely insoluble

in water, and the sulphide of thallium being brown, would probably be

damaged by impure air. But whatever their properties as pigments may be,

their habitudes as such are not yet known. The present scarcity of the

metal renders the colours produced from it mere scientific curiosities.



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