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De Re Metallica, Translated from the First Latin Edition of 1556 by Georg Agricola

Book IX, Agricola appears to use the term in this sense himself. After

236 words  |  Chapter 27

Agricola's time the term _molybdaenum_ was applied to substances resembling lead, such as graphite, and what we now know as _molybdenite_ (_MoS_{2}_). Some time in the latter part of the 18th century, an element being separated from the latter, it was dubbed _molybdenum_, and confusion was five times confounded. [38] Agricola here refers to the German word used in this connection, _i.e._, _hundt_, a dog. [39] If Agricola means the German _centner_, this charge would be from about 4.6 to 5.7 short tons. If he is using Roman weights, it would be from about 3 to 3.7 short tons. [40] The refining of silver in "tests" (Latin _testa_) is merely a second cupellation, with greater care and under stronger blast. Stirring the mass with an iron rod serves to raise the impurities which either volatilize as litharge or, floating to the edges, are absorbed into the "test." The capacity of the tests, from 15 _librae_ to 50 _librae_, would be from about 155 to 515 ozs. Troy. [41] A _drachma_ of impurities in a _bes_, would be one part in 64, or 984.4 fine. A loss of a _sicilicus_ of silver to the _bes_, would be one part in 32, or about 3.1%; three _drachmae_ would equal 4.7%, and half an _uncia_ 6.2%, or would indicate that the original bullion had a fineness in the various cases of about 950, 933, and 912. [42] _Praefectus Regis_.
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1. Chapter 1 2. 1912. It has been made available through the kind permission of 3. INTRODUCTION. 4. 1541. Henry was succeeded in 1541 by his Protestant son Maurice, who was 5. 1881. p. 20. 6. BOOK I. 7. 1. Fluids and gases. 8. 2. Mineral { 9. BOOK II. 10. BOOK III. 11. BOOK IV. 12. 29. For further notes see Appendix C. 13. BOOK V. 14. Book VI. 15. BOOK VI. 16. BOOK VII. 17. BOOK VIII. 18. 1566. The earliest technical account is that of Father Joseph De Acosta 19. 1545. He states that refining silver with mercury was introduced at 20. Book IX. The German term in the Glossary for _panes ex pyrite_ is 21. BOOK IX.[1] 22. 265. Theognis (6th century B.C.) and Hippocrates (5th century B.C.) are 23. introduction of copper could only result deleteriously, except that it 24. BOOK X. 25. Book VII. 26. Book VII, where (p. 220) a table is given showing the Latin and Old 27. Book IX, Agricola appears to use the term in this sense himself. After 28. BOOK XI. 29. BOOK XII. 30. Book I. is devoted to mineral characteristics--colour, brilliance, 31. Book II., "earths"--clay, Lemnian earth, chalk, ochre, etc.; Book III., 32. Book V., lodestone, bloodstone, gypsum, talc, asbestos, mica, calamine, 33. 1614. It is our belief that this refers to the 1612 Wittenberg edition 34. 1550. This was probably an error for either the 1546 or the 1558 35. 1597. It includes on page 880 a fragment of a work entitled _Oratio de 36. part I, _Commentatorium de Mysnia_). _Newe Chronica und Beschreibung des 37. 1700. We have relied upon Booth's translation, but with some amendments 38. 1539. On comparing these various editions (to which may be added one 39. Introduction jigging sieve, 283 40. Book I does not have footnote 24; Book VI does not have footnote 9; Book

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