PDF BOOK ASSAYING IN THREE PARTS

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ASSAYING IN THREE PARTS. To down load book click the below link.

PART 1st GOLD AND SILVER ORES; PART 2d.— GOLD AND SILVER BULLION; PART 3d.— LEAD, COPPER, TIN, MERCURY, ETC.

By C. H. AARON, Metallurgist,

Preface 7

Introduction 9

Implements 15

Assay Balance 23

Materials....: 32

The Assay Office 37

Preparation of the Ore 39

Weighing the Charge 42

Mixing and Charging 43

Assay of Litharge 44

Systems of the Crucible Assay 45

Preliminary Assay 47

Dressing the Crucible Assays 50

Examples of Dressing 62

The Melting in Crucibles 65

Scorification 69

Cupellation 73

Weighing the Bead 78

Parting 84

Calculating the Assay 88

Assay of Ore Containing Coarse Metal 91

Assay of Roasted Ore for Solubility 95

To Assay a Cupel 95

Assay by Amalgamation 96

Roasted Silver Ore Requires no Chemicals 97

To Find the Value of a Specimen 98

Tests for Ores 103

A Few Special Minerals 108

Solubility of Metals Ill

Substitutes and Expedients 113

A Simple Assay Balance 115

Assay Tables 117, 119, 121, 124, 125

Link

http://www.archive.org/details/assaying01aarouoft