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An upward triangle crossed by a horizontal bar.
Also known as: Air triangle
The fire triangle with a bar drawn across its upper part. The bar is what separates the two upward-pointing elements, and forgetting it is the commonest error in reproductions of the set.
Denotes air, one of the four classical elements, in alchemical and early chemical notation.
A triangle pointing upward with a single horizontal line drawn across its upper portion.
Air is the fire triangle with a bar across it; the bar is easily missed or dropped in reproduction.