Note 23 — BOOK VI. (continued 2)

Pompholyx was a furnace deposit, usually mostly zinc oxide, but often containing arsenical oxide, and to this latter quality this reference probably applies. The symptoms mentioned later in the text amply indicate arsenical poisoning, of which a sort of spherical effect on the hands is characteristic. See also note on p. 112 for discussion of "corrosive" cadmia; further information on pompholyx is given in Note 26, p. 394.