t 53 ] 



IV. COHESION 

 I. Solid 



Brittle 



Tenacious 



Plaftic 



Somewhat dup- 

 tile 



Duaile 



TfMigh 



Flexile 



Elaltlc 



Very foft, or re- 

 ceiving the im- 

 preflion of the 

 nail 



Soft, or yielding 

 to the knife 



Hardifh, or 

 yielding with 

 difficulty to the 

 knife. 



Hard, or ftrik- 

 ing fire with 

 fteel 



V<!?ry hard, or 

 refilling the file 



V. FRACTURE 



1. Compact 

 Shivery 

 Glafly' 

 Flat 



Conchoidal 

 Scoriaceous 

 Granular 

 Splintery 

 Earthy 



2. Fibrous 

 '1 hiner 

 Thicker 

 Straight 

 Curved 

 Parallel 

 Pivergent. 

 Stejlate . 



Fafcicled 

 Scaitered 



3. Radiatk 

 Rays 

 Broad 

 Narrow 

 Long 

 Shor*t 

 Straight 

 Curved 

 Parallel 

 Divergent 

 Fafcicled 

 Stellate 

 Spinous 



4. Lamellar 

 Plates 

 Straight 

 Curved 

 Undulate 

 S^jherico-convex 

 Frondofe 

 Parallel 

 Divergent 

 Cutting each o- 



ther, 

 doubly 

 threefold 

 fourfold 

 fix fold 



5. Slaty 

 Parts 

 Thiner 

 Thicker 

 Straight 

 Curved 

 Undulate 



Vl. SURFACE 



Greafy 



Dry 



Cold 



Coldifh 



Tepid 



Uiiecjual 



Smooth 



Coarfe 



Rough with mi- 

 nute equal gra- 

 nulations 



Pitted, wiih 

 hollows 

 cubic 

 pyramidal 

 tubular 

 conic 

 fphcrical 



Striate 

 tranfverfely 

 longitudinally 

 diagonally 

 alternately 

 deculfately 

 feathered 



VII. GRAVITY 



Very ponderous, 

 or in fpecific 

 gravity exceed- 

 ing water by at 

 lead fix times 



Ponderous, or 

 exceeding wa- 

 ter in fpecific 

 gravity at Icart 

 four times 



LightiQi, fpeci- 

 ficrjly heavier 

 than water 

 twice, or fome- 

 thing more 



Light, fpecifix 

 caily heavier 

 than water but 

 not floating 



Floating, fpecj- 

 cally lighten 

 than water 



