saltpeter

The detonations were produced by saltpeter stored in a warehouse.

If the Union can not be preserved without saltpeter, then let enough of this article be employed to secure the result.

They found a place where saltpeter was very thinly and erratically distributed.

He gave enormous doses of powerful drugs—sixty grains of gamboge, and from two to three ounces of saltpeter in a single day.

Since smoked and cured meats are used in making potted meats, saltpeter is quite frequently found in the latter.

Saltpeter was needed for her guns, alkali for her industries, and the chemist was called upon for help.