[1599] The metal known to us as “cadmium” was discovered by Professor Stromeyer in 1818: it is either associated in its ores with zinc, or forms a native sulphuret.
[1600] “Smoky residue.” None of these substances formed in smelting are preserved for medicinal purposes at the present day. Tutty is an impure oxide of zinc.
[1601] “Cluster residue.” From its resemblance to a bunch of grapes.
[1602] “Caked residue.”
[1603] “Shell-formed residue.”
[1604] See B. xiv. c. 16.
[1605] See end of B. iii.
[1606] See end of B. xii.
[1607] We have the same account of the medicinal effects of Cadmia, and the other preparations mentioned in this Chapter, given by Dioscorides.—B.
[1608] For an account of the “alumen” of the ancients, see B. xxxv. c. [52].