What's the difference between herapathite and iodoquinine?

Herapathite

Definition:

• (n.) The sulphate of iodoquinine, a substance crystallizing in thin plates remarkable for their effects in polarizing light.

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Iodoquinine

Definition:

• (n.) A iodide of quinine obtained as a brown substance,. It is the base of herapathite. See Herapathite.

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