Ichthyol′ogist, one skilled in ichthyology.

This has been found to be the case with asafetida, valerian, ichthyol, etc.

If the stage of ulceration has been reached, a paste made from the following prescription, spread thickly on linen and frequently changed, soon cures:—Hydrarg. ammoniat. gr. v., ichthyol ɱx, pulveris zinci oxidi ʒiv, vaseline ℥ss.

In the local treatment, two drugs are of great value in the early congestive stage—ichthyol and formalin.

Ichthyol, 10 to 20% in lanoline spread on linen and worn at night, often dispels an attack at the beginning.