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A triangle above a cross, the sign for sulphur and for the principle of combustibility.
Also known as: Sulfur (alchemical symbol), Brimstone, Sulphur sign
A triangle sitting on a small cross. One of Paracelsus's three principles — the tria prima — where sulphur stood for combustibility and the soul of a substance, not merely for the yellow mineral.
Denotes sulphur, both the mineral and — in Paracelsian usage — the principle of combustibility, one of the three principles alongside salt and mercury.
Encoded at U+1F70A ALCHEMICAL SYMBOL FOR SULFUR.
Contexts: Software
The tria prima — salt, sulphur and mercury — were principles rather than substances in Paracelsus's scheme: what a body was made of in respect of its fixity, its combustibility and its volatility, rather than three ingredients you could weigh out.
16th century onward
A triangle pointing upward standing on top of a small equal-armed cross.
Both are principles of the Paracelsian tria prima.