By John Stevens Henslow
John Stevens Henslow (1796-1861), a pupil of Adam Sedgwick, turned Professor of Mineralogy at Cambridge in 1822. He quickly moved to a chair in Botany, and have become a instructor and mentor to Charles Darwin. This e-book on mineralogy was once first released in 1823. It was once meant to avoid wasting time in school via offering an simply obtainable connection with the composition of varied minerals in response to the rules of atomic idea, which was once then getting into the medical mainstream. In that paradigm, research and exam of any mineral's composition concerned first ascertaining the mineral's ordinary molecules, either 'essential' and 'accidental', and moment, selecting the proportions during which the basic components mixed to shape the integrant molecule of the mineral. Henslow's publication will curiosity historians of technology tracing the advance of atomic idea, and people operating extra extensively within the heritage of college schooling and the highbrow weather of the 19th century.
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Titaniferous—S. G. = 4 . 6 to 4 . 9 . Oxide Titan. . 9) Oxide Iron... 79 to 9 8 . 7 | P e r c e n t Chromiferous— Chromiron—Chrome 2 per cent. APPENDIX I. Red Iron Ore. Var. 1. Fibrous—Red Hcematite. i. Ox. Iron 90 per cent in. Botryoidal—Stalactitic. iv. G. = 4 , 7 to 5. Var. 2. Compact. in. )—slaty—amorphous, iv. 5 to 5. LECTURES ON MINERALOGY. 15 Var. 3. Scaly. i. 5 + Sil. and Al. 5. 5 Henry. Var. 4. 5. ) APPENDIX II. Brown Iron Ore. Var. 1. ) Var. 2. Fibrous—Brown Hematite. Vauq. Theory. i.
G. 5873. vi. Antimoniferous—16 to 28 percent, of Antimony. Argentiferous—11^ oz. to 135. oz. of silver per ton. Ferriferous. Supersulphuret. G. 4. ix. Usual ore of lead—glaze for pottery. D A SYLLABUS OF Species 5. Sulphate of Lead. Klapr. Theory. Kl&pr. Theory. i. Ox. Lead. 71. 71. 5 1 Sulp. 5 1 Water 2. &c. 25 &c. Ox. Iron . 1. 2 II. Prim. Rectangular octohedron. in. Crystals 8—granular—amorphous, iv. G. 3. Species 6. Carbonate of Lead. Westrumb. Theory. Theory. Ox. Lead. 5 Carb. 16. 72 18. 3 Ox.
046. (c) Retinasphalt. Coals. (a) Jet. (6) Cannel Coal—39 to 75 percent, of Carbon, with Bituminous oil and earth. iv. G. 2. (c) Common Coal—Black Coal. i. Carbon 56 . 8 + Asphalt and Maltha 43. iv. S. G. 2 to 1 . 3 . (d) Lignite—Brown Coal. APPENDIX Carbonic Acid. III. 10 A SYLLABUS OF GENUS III. Species I. BORON. Boracic Acid. Gmelin. Berz. Theory. Boron... 4 74. 6 25. 4+ in. Mamellated incrustations, iv. G. 48. GENUS IV. Species 1. 1 2 SILICIUM. Silica—Quartz. II. Prim. Obtuse rhomboid P. P ' = 85° 45'.
A Syllabus of a Course of Lectures on Mineralogy by John Stevens Henslow