A hand-book on silex, embraced in three practical treatises: I. On soluble glass, and all its applications in the arts. II. On glass making, in all its details. III. A guide for soap making, the manufacture of all soaps and their manipulations... (1871)
Feuchtwanger, Lewis, 1805-1876 · New York : L. & J. W. Feuchtwanger · leaf 50
APPARATUS FOR DISSOLVING QUARTZ, TINDER PRESSURE OF FIVE ATMOSPHERES. H.E.PEASESC
Glass manufacture · Soap · Soluble glass
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.