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

By John Stevens Henslow

John Stevens Henslow (1796-1861), a scholar 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 used to be meant to save lots of time in school via delivering an simply obtainable connection with the composition of varied minerals in accordance with the rules of atomic conception, which was once then coming into the medical mainstream. In that paradigm, research and exam of any mineral's composition concerned first ascertaining the mineral's basic molecules, either 'essential' and 'accidental', and moment, picking out the proportions within which the fundamental constituents mixed to shape the integrant molecule of the mineral. Henslow's ebook will curiosity historians of technological know-how tracing the advance of atomic conception, and people operating extra widely within the heritage of college schooling and the highbrow weather of the 19th century.

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Lime Iron 1. « 2. in. Pulverulent. so A SYLLABUS OF Species 11. Phosphuret of Copper? Species 12. Phosphate of Copper. Klap. Theory. i. Per-oxideCopper.... 13 68. 37 I Phosphoric Acid .... 95 23. 93 7. ) Lunn Theory. 847+ Phos. 98 + ii. Prim. Rectangular octohedron. HI. Crystals 3—fibrous—amorphous, iv. G. 07. Species 13. Arseniate of Copper. Chenevix. "Vauq. Klap. i. C. 49 60. 62 Ars. 7 30 29 29 %\ 41 43 45. Water .... 35 • • •• 16 21 18 21 .... 8 n o i Loss 2 Var 1 4 3 5 6 2 4 2 4 LECTURES ON MINERALOGY.

788—Its great abundance and numerous uses—steel. Species 1. Native Iron. i. 5 to 94 percent. in. Amorphous—plated, ramose, cellular. vin. Volcanic and Meteoric. 5. G. 4. Species 2. Peroxide of Iron. ore—fer oligiste. Hass, i. Iron Oxygen Specular Iron Theory. 36+ I 2 14 A SYLLABUS OF ii. Prim. Acute rhomboid P. F =86° 10'. in. Crystals 6—Lamelliform, iv. S. G. = 5. Species 3. Ore. Oxydulated Iron—Magnetic Iron Berz. Theory. I. Protox. Iron... 0+ Perox. 9+ I 2 Buch. Iron Oxyg 70 > 29 $ or i Protox.

4808 and Lime) Copper trace Ferruginous) Silica ) in. Amorphous. iv. S. G. = 8. Species 3. Per-oxide of Lead—Native Minium. in. Pulverulent—amorphous. 33 LECTURES ON MINERALOGY. Species 4. Vauq. Sulphuret of Lead—Galena. Theory. Westr. Theory. Thorns. Theory. Lead. 54 53. 08 + I Sulph. 06 + 1 Silic. 1 oo &c. &c. &c. Limej Vauquelin. r Lead.... 69. 69. Sulphur . 16. 18. Lime & | i K 13. / Meade. A 68. 16. 16. 64. 18. 18. 72. 24. 4. Lead... 65. 20. 5 + 2 o ii. Prim. Cube. in. Crystals—granular—amorphous.

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