— — Burnt Oil from Hardened Steel, [686]
— — Enamel and Tin Solder, [188]
— — Fragments of Steel from Other Metals, [687]
— — Finger Marks from Books, etc., [186]
— — Glue from Glass, [208]
— — Gold from Silver, [382]
— — Grease Spots from Marble, [197]
— — Hard Grease, Paint, etc., from Machinery, [200]
— — Ink Stains on Silver, [201]
— — Nitric-acid Stains, [185]