CONTENTS.

Page.

COPPER:

Of the ores of copper

Of the assay and analysis of copper ores

Of the reduction or smelting of copper ores

Of the refining of black copper

Properties of pure copper

Preparation of sulphate of copper, or blue vitriol,

Verdigris

Crystalized Verdigris, or acetite of copper

Radical Vinegar

55

61

67

Scheele's & Brunswick Green-Verditer

70

Packfong, Ancient weapons

Hardening copper with phosphorus

Ditto and whitening copper with arsenic

Plating copper with silver

Silvering copper various ways

Platinating Copper

Tinning Copper

Papers on ditto

106, 107

107

108

112

.. 113

11

114, 125

To separate copper from silver. M. Goetling's method 125

Patent Mineral Yellow

Sheet Lead Boxes

Chromat of Lead

Naples Yellow

Mortar (Editor)

Hydrostatical engine, with a plate
Ducket's plough, with a plate

Political economy

Notices, viz. Decomposition of Azot

To Correspondents

Iode on violaceous

Assay and Analysis of the ores

Smelting and reduction of Lead ores
Refining Lead for Silver

Properties of Metalic Lead

Processes for manufacturing White Lead

Manufacture of Red Lead

Acetite (or Sugar) of Lead

Manufacture of Shot

To ascertain the quantity of Whiting in White Lead

Water Cement (Editor)

Perkins on Water Mills (Plate)

Graff's Steam Engine Boiler (Plate)

Statistics (Editor)

Latrobe on Roads

Deliquescent and efflorescent Salts

On Manufactures

166

170

172

174

175

Cookery

Notices

LEAD:

339

Shot

339

Sugar of Lead

343

TIN:

315

Ores of Tin

315

Weight of mixtures (alloys) of tin and lead

365

Pewter

Tinning Copper

Zinc for coating copper

Manufacture of tinned iron plates

Manufacture of tinfoil

Silvering and polishing of looking glasses

To whiten copper, brass, or iron wire

Aurum musivum

On the scarlet dyer's composition (Editor)

Gology (Editor)

On the relative age of metals

Remarks on Manufactures (Editor)

On the desulphuration or roasting of iron ores

Professor Cutbush on Seltzer water

Remarks by the Editor

Remarks by the Editor

The rev. Mr. Cartwright

Coloured flames by rentral salts (Mr. Linton)

Weaving by Machinery

Patents

The rev. Mr. Cartwright, and Arthur Young, Esq. on

the use of yeast in typhus

Armine and Elvira by the rev. Mr. Cartwright

Gueniveau on the desulphuration of metals

Notes and observations on the Analysis of mineral wa-

461

465

478

ters, by the Editor

Distilling, by the Editor

Whiskey distilled in Lancastar County, Pennsylvania

Coleman's Iron Works

On coverings for the roofs of houses (Editor)

On parched corn as food

Errata. On page 225 and 226, for fig. 1, read fig. 4.

Of COPPER and the Manufactures dependant on Copper.

Under this head I shall treat briefly

Of the ores of copper.

Of the assay, and analysis of copper ores.

Of the reduction or smelting of copper ores.
Of the refining of black copper.

Of the properties of copper.

Of the preparations of copper, viz.

Sulphat of copper, or blue vitriol.
Verdigris.

Distilled verdigris.

Chrystalli veneris.
Radical vinegar.

Scheele's green, arseniat of copper.
Brunswick green, tartrat of copper.
Verditer, carbonat of copper.
Hatchet's brown prussiat of copper.

Of the alloys of copper, viz.

Brass. Orichalchum.

S Prince Rupert's metal, pinchbeck, similon,
Or de Manheim, Tombac. Mesure's metal.
Bronze.

A

Bell metal.

White copper. Tutenag.
The Gong. Petong.

Ancient weapons and coins.
Of plating copper with silver.

platina. tin.

Of the ores of Copper. Copper is found native: it is also found mineralized, by oxygen, by sulphur, by arsenic, by both sulphur and arsenic, by the carbonic acid, by the sulphuric acid, by the muriatic acid, by the phosphoric acid, by the arsenic acid. It is found in the state of an ore, frequently containing iron, some times silver, some times zinc, some times antimony, some times lead; one or more of these.

Copper is found native, on the immediate vicinity of some part of Lake Superior, of which I have seen specimens, but cannot point out the place.. I have also specimens of native copper from a mine in Maryland.

The common sulphuret of copper, is found in Connecticut, in Maryland, in New Jersey, in some parts of Pennsylvania, in Virginia; but I know of no place where it is worked to profit.

The oxyds, are red oxyd, containing 88,5 copper, 11,5 oxygen. Azure or mountain blue 70 copper, 20 carbonic acid, 10 oxygen. Malachite, mountain green, 58 copper, 18 oxygen, 12,5 carbonic acid, 11,5 water. Sulphuretted copper ores: these vary greatly in the quantity of copper they contain. Arseniated copper ore, such as the green micaceous, the olive-green foliated, the brownish-green fibrous-these contain from 49 to 60 of copper, combined with arsenic acid. Phosphat of copper, greyish-black on the outside, green internally containing 68,13 of copper in the state of oxyd, and 30,95 of arsenic. Muriat of copper hitherto found only in Peru