flowers of sulfur
flowers of sulphur

It gave out the faint crackle characteristic of flowers of sulfur when moistened.

Flowers of sulfur or sublimed sulfur are yellow flakes of sulfur.

This is the predominant form found in "flowers of sulfur", "roll sulfur" and "milk of sulfur".

Alchemists prepared this by combining mercury, tin, sal ammoniac, and flowers of sulfur, grinding, mixing, then setting them for three hours in a sand heat.

These electrified areas are then tested by sprinkling a mixture of powdered flowers of sulfur and red lead (Pb3O4 or lead tetroxide) onto the plate.

Most sulfur contains trace quantities of sulfur-containing acids, and these can cause spontaneous ignition - "Flowers of sulfur" or "sublimed sulfur", despite the overall high purity, contains significant amounts of sulfur acids.

Very dilute amounts of powdered gold or platinum were dissolved in aqua regia and added to spirits of tar for platinum and a mixture of turpentine, flowers of sulfur and linseed oil for gold.