■EXTERNAL CHARACTERS. 2 Particular generic characters of solid minerals. j" Shape of the dis tinct concre tions. Surface of the distinct con cretions. Lustre of the distinct con cretions. •5 ho cs -e O Particular generic 1 characters of friable minerals. Oh V5 < - . r § t -I cy- g o, i The streak. O te |_The soiling. 'The transparen- M The hardness. u O The tenacity. o The frangibili- ty- 2 ^ The flexibility. rt r. The adhesion to u the tongue. Forthehear- The sound. ing- Particular generic characters of fluid minerals. The soiling. The friability. Transparency. Fluidity. Remaining general generic external characters. r 3. The unctuosity. For the touch. ■] 4. The coldness. (_ 5. The weight. For the smell. 0. The smell. For the taste, 7 - "1 taste.