Sect. VII.

Sect. VIII.Sect. IX.

Sect. X-Sect. XI.

The CONTENT S.

Page

4. Gold with compound menstrua 95

5. General properties of solutions of gold 97

6. Separation of gold from acids by inflammable

liquors - - 1 o 1

7. Precipitation of gold by alkaline salts 104

8. Precipitation of gold by metallic bodies 108

9. Gold with sulphureous bodies - in

Of the alloy of gold ; and the methods of judging

of the quantity of alloy it contains, from the co-lour and weight — — — 114

I.. Of the alloy of gold — 1 114

2. Method of estimating the flneness of gold from

its colour - - 119

3. Of estimating the fineness of gold from its

gravity — —. - — 125

Of the assaying of gold — — - 127

1. Cupellation with lead ——- 129

2. Parting with aqua fortis — 135

Of the refining of gold, and the separation of small

portions of it from other metals — 144

j. Separation of gold from base metals by testingwith lead - — 144

Separation of goldfrom fiver by aquafortis 147Purification of gold from fiver and base metals

by cementation -- - 154

Refning of gold from fiver and base metals

by antimony - - — 156

Purifcation of gold from platina, fiver, and

base metals, by aqua regia - 159

Extraction of a small portion of gold from a

large quantity of fiver -- 161

> Extraction of gold from copper - 166

. Separation of gold from gilt works — 168

Of tinging glass and enamel by preparations of

gold -- ■ ■ 170

Ehe mineral history of gold - 18 1

I. Of the matrices of gold, and its dffemination

through different minerals - - 181

2. Separation.

I

/