A Syllabus of a Course of Lectures on Mineralogy by John Stevens Henslow

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By John Stevens Henslow

John Stevens Henslow (1796-1861), a pupil of Adam Sedgwick, grew to become 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 ebook on mineralogy used to be first released in 1823. It used to be meant to save lots of time in school by way of offering an simply available connection with the composition of varied minerals in keeping with the foundations of atomic idea, which was once then coming into the clinical mainstream. In that paradigm, research and exam of any mineral's composition concerned first ascertaining the mineral's common molecules, either 'essential' and 'accidental', and moment, identifying the proportions within which the basic parts mixed to shape the integrant molecule of the mineral. Henslow's booklet will curiosity historians of technology tracing the improvement of atomic conception, and people operating extra extensively within the background of collage schooling and the highbrow weather of the 19th century.

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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. 3+ Water 15. 15. 75 1 1 in. Mamillary—stalactitic. iv. G. 7 to 4. Var. 3. Compact. Peroxide Iron 84 percent, iv. G. 7. Var. 4. Scaly. Var. 5. Ochreous. Var. 6. Umber—Ox.

Copper . 71 1 Per. ox. Iron . . 5 &c. 1 Loss 95 iv. G. = 2 . 6 2 . Species 8. Green Carbonate of CopperMalachite. Fontana Phill. Theory. i. Per-ox. Copper . 75. 10 1 Carb. 81 1 Klap. Proust. Vauq. Copper.... 58. 2 14. Water . . 65 Carb. Acid 18. 27. 25 Silica . . 1. Lime 1. 81 LECTURES ON MINERALOGY. 29 in. Capillary —fibrous— stalactitic—pseudomorphous—amorphous. IV. G. = 3 . 5 . Species 9. Blue Carbonate of Copper. Phillips Theory. Per-ox. Copper . 36 3 Carb. 20 2 Or? Green Carb. Copp. 14 2 Bi.

Lime 2 Copper.... 9, II. Prim. Cube. in. —Concretionary—amorphous. iv. S. G. = 3. Species 12. Chromate of Iron. Tassaert i. Ox. Iron . . 36. 6 Silica Alumina Loss 4 Ox. I r o n . . 9 + Chrom. 0 + Vauq. Laog. Klap. 7 34. 43. 53. 2. 1. 3 11. 1. 7 34. 43. 5 2. 6. 3 II. Prim. Regular octohedron. in. —granular—amorphous. iv. G. = 4 . 0 3 . 20 A SYLLABUS OF Species 13. Tungstateof Berzel. Elhny. —Wolfram. Vauq. Klap. 2 i. Ox. 5 18. 9 Tung. Acid.... 77 65. 37. 22. 25 2. 5 18 JJTheory. Tune. 06 45. 60 ii.

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