1611. Florio, Intrasmutabile, vntransmutable.
1682. H. More, Annot. Glanvill’s Lux O., 52. Spirits specifically different, are untransmutable one into another.
a. 1776. Hume, Ess. (1777), II. 351. Each character … appears to me, in practice, pretty durable and untransmutable.
