34 Dißinftive Characlers. arranged, or at leaft have no particular defermi- nate direöion nor inequalities, but thofe arifing from the mere a£t of ^rcaking it: of this frac- ture there are fix forts, the uucveu, evcn, con- choidal, fplinUry, eartby, and hack/y. 1 he uneven takes place when great inequalities prevail in the direclicn of the line of fradture. Ihesvcn is that which prefents flat furfaees with fcarcely any proniirient parts. The concboidal, othervvife called teßaceous, pre- fents round elevations and depreflions like fhells: the perfetl is fingle, and the elevations are often wrinkled ; the imperfeß is flatter, or the eleva tions and depreflions are nrore minute and more numerous. The fplintery difcovers fcales arifing from fplits or fiflures parallel to the line of fradture, which are thicker at the end at which they ftill adhere than at the end at which they are feparate; and confequently are opake at the thick, but fomewhat tranfparent at the other end, elfe their feparation would fcarcely be perceived : thefe fplinters are either coarfe or fine, fometimes fo minute as to be fcarcely dilcernible. From the fize of thefe fplinters minerals are dcnominated coarfe or fine grained. The carthyfraäure is that which prefents fmall rough prominences, as dry clay: it is however dif- tinguilhed into coarfe and fine. It is commonly deflitute of lnftre and tranfparency. 1 he hackly prefents Iharp points, eafily per ceived in feeling it. Of