in zoology. See RANA.

Toad-Fish. See Lophius.

Toad-Flax, in botany. See Antirrhinum.

Toad-Stone, a genus of argillaceous earths examined by Dr Withering. He describes it as of a dark-brownish grey colour; its texture granular; neither effervescing with acids nor striking fire with steel. The cavities of it are filled with crystallized spar, and in a strong heat it is fusible per Philosophical Transactions for 1782.

An hundred parts of toad-stone contain from 56 to 63 5 of siliceous earth, near 15 of argillaceous earth, 7.5 of calcareous earth, and 16 of oxidated iron. Dr Kirwan observes, that the toad-stone is not much different from bafates; only that it is softer; it contains also a smaller proportion of iron, and a larger one of siliceous earth.