THE

REPERTORY

OF

ARTS, MANUFACTURES,

AND

AGRICULTURE.

Consisting of

ORIGINAL COMMUNICATIONS,.

SPECIFICATIONS OF PATENT INVENTIONS,

PRACTICAL AND INTERESTING PAPERS,

SELECTED FROM

THE PHILOSOPHICAL TRANSACTIONS AND

SCIENTIFIC JOURNALS OF ALL NATIONS.

MONTHLY INTELLIGENCE

RELATING TO

THE USEFUL ARTS,

PROCEEDINGS OF LEARNED SOCIETIES,

AND

NOTICES OF ALL PATENTS GRANTED FOR INVENTIONS.

VOLUME XX.-SECOND SERIES,

London:

PRINTED FOR J. WYATT,

REPERTORY. OFFICE, HATTON GARDEN,

1812.

CONTENTS

OF THE

TWENTIETH VOLUME, SECOND SERIES.

Specifications of Patents.

Page

Mr. BENTHAM's for a certain Invention of a secure economical

Mode of laying Foundations, and in some Cases of proceeding

with the Superstructure of Works of Stone or of Brick, or

other artificially composed Materials, particularly applicable

to the Projection of Wharfs and Piers into deep Water, to the

Construction of Bridges, and to the Formation or Improve-

ment of Harbours, as well as to the Erection of heavy Build-

ings on bad Ground,

--

Mr. ROCHFORT's for a new Method of preparing Coffee,

Mr. GRIFFITH'S for a certain Improvement in the Manufacture

of Soap, for the Purpose of washing with Sea Water, and

with other Water

-

Mr. COOPER'S Patent for certain Apparatus to be fixed to the.

Naves of Wheels and Beds of Axletrees of Carriages, so as to

prevent Accidents from the Axletrees breaking, or if either

of the Axletrees of such Carriages should happen to break,

the Carriage dropping only a Quarter of an Inch, the same

Carriage will proceed on to the End of its Journey without

Danger, &c.

26

Mr. BROWN's for an improved Construction of Buoys for Ships
Vessels, and for Mooring Chaius, or similar Purposes,

Mr. GooD's for an Improvement in Valves for various Purposes, 65

Mr. SUTTON'S for an improved self-acting Curtain or Window-

blind Rack,

Mr. CRAIGIE's for certain Means and Improvements on Wag-

gons, Carts, and other Wheel Carriages, whereby Friction

may be saved, Labour facilitated, and a greater Degree of

Safety obtained,

Mr. STURGEON's for improved Castera,

-

67

69

71

Sir

Page

Sir HOWARD DOUGLAS's for an improved reflecting Circle or
Semicircle,

129

Mr. Hobson's for a Method of separating the alkaline Salt from
the Acid, as it exists in various Substances,
Mr. COLLINGE'S for certain Improvements in and upon 'Carri-
ages and Wheel Boxes and Axletrees,

Mr. BASTONE'S for certain Improvements applicable to. Bed-

steads, and various other Things,

130

133

133

Mr. BAGNAL'S for a Method of making Bridle-bits, Snaffles, and

Bradoons for Horses, Martingale Hooks, and Rings of Iron,

Steel, or other Metals,

-

Mr. PEARSALL'S for a Method of constructing Iron-work for

certain Farts of Buildings,

138

193

Mr. FOTHERGILL's for a Method of making Copper Rollers for

Printing,

195

1

Mr. MIERS'S Patent for a Method of accelerating the Evapora-

tion of fluid or liquid Bodies, of destroying the noxious and

offensive effluvia arising from spent Lees, or other liquid,

fluid, or solid Substances, and of generating an increased

Degree of Heat without additional Fuel,

Mr. HUDSON's for a Composition for printing or painting on

Paper, Linen, stuccoed Walls, and Boarding, for the Purpose

of ornamenting the Walls and Ceilings of Rooms,

Mr. BAKER's for kneading Dough by means of Machinery,

Mr. WITTY's for farther Improvements in his Invention for the

Construction of Steam-Engines,

-

Messrs. JAMES and JONES's Patent for an Improvement in the

Manufacture of Barrels of all Description of Fire-Arms and

Artillery,

--

197

201

204

257

264

Mr. ZINK's for a Method of manufacturing Verdigris, to be called

the Imperial Verdigris,

271

Mr. Lowe's for an Improvement in the Manufacture of a Fabric

composed of Flax and Cotton, which is applicable to many.

useful Purposes,

274

Mr. SMETHURST's for eertain Improvements applicable to Lamps

of different Descriptions,

Mr. DoDD's for certain Machinery, and the Application of Steam

to communicate Heat and Motion to Wines, Porter, and other

Liquids or Fluids in Cellars, Storehouses, Warehouses, or

other Places,

321

320

Mr.

Page

Mr. STRACHAN's for a Method of preparing the Ore of Cobalt
for the various Purposes for which it is applicable in Trade,
Manufacture, and Painting,

Messrs. PATTEN and HANKINSON's for a Discovery and Improve-
ments in the tanning of Leather, by the Use of Pyroligneous
or Wood Acid,

Original Communications.

-

328

330

19

25

Observations on Mr. ROCH FORT's Patent for a new Method of

preparing Coffee. Communicated by the Patentee,

Observations on Mr. COOPER'S Patent for certain Apparatus to

be fixed to the Naves of Wheels and Beds of Axletrees of

Carriages. Communicated by the Patentee,

Observations on Mr. GooD's Patent for au Improvement in

Valves for various Purposes. Communicated by the Patentee, 67

Method of constructing centering Frames for Arches, between

Abutments and Piers, without any Support from Piles or

Props beneath; proposed by Mr. J. W. BoswELL. Communi-

cated in a Letter to the Editors,

Observations on Mr, BASTONE'S Patent for certain Improve-

ments applicable to Redsteads, and various other Things.

Communicated by the Patentee,

Observations on Mr. BAGNAL'S Patent for a Method of making

Bridle-bits, Snaffles, and Bradoons for Horses, Martingale

Hooks, and Rings of Iron, Steel, or other Metals. Commu-

nicated by the Patentee,

Observations on building the Piers and Abutments of Bridges,

the Walls of Wharfs, &c. without the Expense of Coffer Dams;

and on suspending the Arches of Iron Bridges with Chains from

above while being constructed, instead of supporting them by

centering from below. By Mr. JonN ISAAC HAWKINS. Com-

municated in a Letter to the Editors,

Observations on Mr. MIER'S Patent for a Method of accele-

rating the Evaporation of fluid or liquid Bodies, &c. Com-

municated by the Patentee,

Observations on Mr. BAKER'S Patent for kneading Dough by

means of Machinery. Communicated by the Patentee,

On Iron Roofing. By T. D. W. DEARNE, Esq. Communicated

in a Letter to the Editors,

73

137

139

141

199

205

206

Observations