Note 22 — Chapter XII · VIGNETTING
Reading edition
Footnote [22] Hydrofluoric acid is always supplied by chemists in gutta-percha bottles, as it attacks glass. A spare gutta-percha bottle can easily be procured.
Reading edition
Footnote [22] Hydrofluoric acid is always supplied by chemists in gutta-percha bottles, as it attacks glass. A spare gutta-percha bottle can easily be procured.