A Manual of Pyrotechny; or, A Familiar System of Recreative Fire-works

by G. W. Mortimer

To prepare Iron-sand.

6. To prepare iron-sand.—Melt in a glazed earthen pan some brimstone over a slow fire, and when melted throw in some filings, which keep stirring till they are all covered with brimstone, this must be done while it is on the fire; then take it off and stir it very quickly till cold, when it must be rolled on a board with a wooden roller, till broken as fine as corned powder, after which sift from it as much of the brimstone as possible.