[ 37 3 CLASS III. inflammable fossils. * I 'HE foffils belonging to this clafs are light, A brittle, moftly opaque, always yellow, brown or black, fcarcdy ever cryftallized, and do not feel cold. 1 hey are more nearly allied to the metallic than to the faline or earthy claffes of foffils. This afs is by Werner divided into four genera, viz. i Sulphur genus. 2 . Bituminous genus, a. Gra phite genus. 4. Relin genus. The Sulphur Genus contains one fpecies, viz. Sulphur, which contains the following fubfpecies • «. Common Sulphur; A. Volcanic Sulphur. Ihe Bituminous Genus is fubdivided into the Wlowing fpecies: x. Fojil or Mineral Oil. 2 . Mi- a Elait A°r Wh ' Ch ai ' C thrce fubr P«ies. :S C \ b - Eanhy " S1 W- 3- BroJn Coal, ains the following fubfpecies: a. Bitu minous Wood; b. Earth Coal; c. A ] U m Earth; d. Common Brown Cml • * iu 1 ^ , . w,1 '-oal; if. Muir Coal. a. Rlark zi c or r Ti ufcd to be te,m,!d ' st ° M «■c— mon Coal, wh.ch comprehends the following fub- P«ies: n. Pitch Coal; 4. Columnar Coal; r. Slate Coal;