Note 9 — CHAPTER TEN
Reading edition
Footnote 9
:
The formula for making the cleansing solution is as follows:
1 cup water.
1 cup concentrated sulfuric acid.
1 cup concentrated nitric acid.
1 teaspoonful concentrated hydrochloric acid.
The sulfuric and nitric acids must be measured in glass or china cups, and the hydrochloric acid must be measured in a silver-plated spoon or in glass—not in tin.