Treatise on Mineralogy, or the Natural History of the Mineral Kingdom, Tr. with Additions by W. Haidinger (Volume 1)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1825. Excerpt: ... CHARACTERS OF THE CLASSES, ORDERS, GENERA, AND SPECIES. CHARACTERS OF THE CLASSES. CLASS I. G. under 3-8. No bituminous odour. Solid: taste. CLASS II. G. above 1-8. Tasteless. CLASS III. G. under 1-8. Fluid: bituminous odour. Solid: no taste. CHARACTERS OF THE ORDERS. CHARACTERS OF THE ORDERS OF CLASS I. I. Ordek. GAS. G. = 0-0001... 00014. Expansible. Not acid. II. Order. WATER. G. = 10. Liquid. Without odour or taste. III. Order. ACID. G. = 00015... 3-7. Acid. IV. Order. SALT. G. = 1-2... 2-9. Solid. Not acid. CHARACTERS OF THE ORDERS OF CLASS II. I. Orotr. HALOIDE. Non-metallic. Streak uncoloured. H. = 1-5... 5-0. G. = 2-2... 3-3. Pyramidal or prismatic: H. = 40 and less, cleavage imperfect, in oblique directions. Tessular: H. = 4-0. Cleavage monotomous, eminent: G. = 2,4 and less. H. under 2-5: G. = 2-4 and less. G. = 2-4 and less: H. under 2-5, no re-sinous lustre. II. Order. BARYTE. Non-metallic. Streak uncoloured or orange-yellow. H. = 2-5... 50. G. = 3-3... 7-3. Cleavage monotomous: G. = 4-0 and less; or = 5-0 and more. Lustre adamantine or imperfect metallic: G. = 5-0 and more. Streak orange-yellow: G. = 6-0 and more. H. = 50: G. under 4-5. G. under 4-0; and H. = 50: cleavage di-prismatic. III. Order. KEETE. Non-metallic. Streak uncoloured. Cleavage not monotomous, not perfect peritomous. H. = 1-0... 80. G. above 5'5. IV. Order. MALACHITE. Non-metallic. Colour blue, green, brown. Cleavage not monotomous. H. = 20... 5-0. G. = 20... 4-6. Colour or streak brown: H. = 30 and less, G. above 2-5. Streak blue: H. = 4-0 and less. Streak uncoloured: G. = 2-2 and less, H. under 3-0. V. Order. MICA. Cleavage monotomous, eminent. H. = 10... 4-5. G. = 1-8... 3-2. Metallic: G. under 2-2. Non-metallic: G. above 2-2. H. as 3-0 and more: rhombohedral. G. under ...