A new Electrical Instrument, by Mr. Wilson. 3. New Filtering Apparatus, by Professor Parrot. 4. Original Blowpipe, by the Abbé Melograni. 5. Apparatus for Filtration, by Sir H. C. Englefield, Bart, &c. F. R. S. 6. Structure for purifying an entire Stream of Water. 7. Very simple striking Part of a Clock, by Mr. Prior. 8. An Instrument for counting the Number of Draughts from a Mine, by Mr. Antis. 9. An Inftrument for delineating in Perspective. 10. Cheap Apparatus for drawing Ovals. 11. Sketch of Mr. Malton's Method of making very large Port-folios for Drawings and Prints. 12. A Lamp for burning Tallow, by Mr. J. W. Boswell. 13. An Evaporating Furnace, by Curadau. · 14. A Gripe for the Safety of Carriages, by Mr. Bowler. perpetual First Mover. 16. A new Parallel Rule. 17. A new Compensation Pendulum, by Mr. Edward Troughton 18. An Instrument for measuring the Absorption of Gases, by Morozzo. 19. Diagram to explain the Galvanic Energy upon Water, by C. Wilkinson, Esq. 20: Two Plates exhibiting a Condenser of Force, by which the Action of a variable First Mover is converted into a constant Pressure, by Prony.

15. A

Soho Square, December, 1804.

TABLE OF CONTENTS

TO THIS NINTH VOLUME.

SEPTEMBER, 1804.

Engravings of the following Objects: 1, 2. Two Plates of Apparatus for Ex-
periments on Heat, by Count Rumford; 3. A new Electrical Inftrument, by
Mr. Wilfon; 4. A new Filtering Apparatus, by Profeffor Parrot; 5. Ori-
ginal Blow-Pipe, by the Abbé Melograni.

I. Letter from Mr. John Gough, containing a Narrative of fome lefs common
Effects of Lightning, by the Rev. Jonathan Wilfon, and Remarks by the Coin-

municator

Page 1

II. On the Computation of Tables of Squares and Cubes. In a Letter from

E. O.

4.

III. Analysis of a Triple Sulphuret of Lead, Antimony, and Copper, from

Cornwall. By Charles Hatchet, Efq. F. R. S. From the Philofophical

Tranfactions for 1804

14

IV. Defcription of a compound Electrical Inftrument for condensing and dou-

bling; with Experiments. By Mr. Wilfon

19

V. Note refpecting the Sufpenfion of Zinc in Hidrogen, and the confequent

Ignition and Fusion of Platina Wire. By Amicus

VI. Description of a Blow-Pipe acting by the Preffure of Water, by the Abbe

Melograni. In a Letter from Mr. G. B. Greenough

25

VII. Outlines of the Mineralogical Systems of Romé de Life and the Abbé

Hauy; with Obfervations. By the Abbé Buée. Communicated by the Hon.

Robert Clifford

26

VIII. Defcription of a Filtering Machine, invented by Profeffor Parrot of

Paris. In a Letter from a Correfpondent

40

-

IX. Medico-Chemical Researches on the Virtues and Principles of Cantharides.

By H. Beaupoil

41

X. Experimental Determinations of the Latent Heat of Spermaceti, Bees' Wax,

Tin, Bifmuth, Lead, Zinc, and Sulphur. By Mr. William Irvine. Com-

municated by the Author

45

XI. Strictures on Mr. Dalton's Doctrine of Mixed Gafes, and an Answer to

Mr. Henry's Defence of the fame. In a Letter from Mr. John Gough 52

XII. An Enquiry concerning the Nature of Heat, and the Modes of its Com-

munication. By Benjamin Count of Rumford, V. P. R. S. &c. Abridged

from the Philofophical Tranfactions for the Year 1804

XIII. Experiments and Calculations relative to Phyfical Optics. By Thomas

Young, M. D, F. R. S. From the Philof. Tranfactions for 1804

58

63

OCTOBER,

OCTOBER, 1804.

Engravings of the following Objects: 1. An Apparatus for Filtration, by Sir

H. C. Englefield, Bart. &c. F. R. S.; 2. Structure for purifying an entire

Stream of Water; 3. Very fimple ftriking Part for a Clock, by Mr. Prior;

4. An Inftrument for counting the Number of Draughts from a Mine, by

Mr. Antis; 5. An Inftrument for delineating in Perfpective; 6. Cheap Ap-
paratus for drawing Ovals; 7. Sketch of Mr. Malton's Method of niaking
very large Port-folios for Drawings and Prints.

I. Extract of a Letter from Count Apollos de Mouffin Poufhkin to Charles

Hatchett, Efq. F. R. S. defcribing his Method of preparing Malleable Pla-

tina. Communicated on the Request of the Count, by Charles Hatchett,

Efq. F. R. S. and now first published

Page 65

II. On Pepper. By Thomas Thomfon, M. D. Communicated by the Au-

thor

68

III. Letter from the Abbé Buée on Mr. Romé de Lifle's and the Abbé Hauy's

Theories of Crystallography

78

IV. Obfervations on Mr. Gough's Strictures on the Doctrine of Mixed Gafes,

&c. In a Letter from Mr. J. Dalton

89

92

94

V. Account of the Striking Part of an Eight-Day Clock. By Mr. John

Prior, of Nefsfield, Yorkshire. Communicated to the Society of Arts

VI. On the Cost of making Phosphorus. In a Letter from J. P.

VII. On the Purification of Water by Filtration; with the Defcription of a

fimple and cheap Apparatus. In a Letter from Sir Henry C. Englefield,

Bart. F. R. S. &c.

-

-

95

VIII. Experiments on the Effects of Heat modified by Compreffion, by Sir James

Hall, Bart. Read in the Royal Society of Edinburgh, August 30, 1804. Com-

municated by the Author

98

IX. Atmospherical Air not a mechanical Mixture of the Oxigenous and Azotic

Gafes, demonstrated from the Specific Gravities of thefe Fluids. In a Letter

from Mr. John Gough

107

X. Letter from Thomas Young, M. D. F. R. S. &c. announcing the Discovery

of a new moving Star, by Mr. Harding, of Lilienthal; and on other Sub-

jects

112

XI. Defcription of an Inftrument to afcertain the Number of Lifts made from

a Mine, in any given Time. By Mr. John Antis

114

120

XII. On Galvanifin. In a Letter from Ra. Thicknesse, Efq.

XIII. Defcription of an Inftrument for drawing in true Perfpective from Na-

ture, and of another of confiderable Simplicity and Cheapnefs for deline-

ating Ovals. In a Letter from a Correfpondent, R. B.

122

In a Letter from

123

128

XIV. On the Computation of Tables of Squares and Cubes.

H. G.

XV. Letter to the Editor from Mr. William Henry, in Reply to Mr. Gough 126

XVI. Defcription of a very fimple and cheap Contrivance for making Port-

Folios of large Dimenfions. By the late James Malton, Efq.

XVII. Experiments and Calculations relative to Phyfical Optics. By Thomas

Young, M. D. F. R. S. From the Phil. Tranf. for 1804

130

Scientific News, Account of Books, &c. 141-National Institute Prizes, ib.-

Extract of a Letter from Profeffor Bode, Aftronomer Royal, to Mr. A. F. Tho-

elden, 142-Extract of a Letter from Mr. G. B. Greenough, 143-Organic

Remains of a former World. An Examination of the Mineralized Remains

of the Vegetables and Animals of the Antediluvian World, generally termed

Extraneous Foffils. By James Parkinson, Hoxton, 143.

NOVEMBER,

NOVEMBER, 1801.

Engravings of the following Objects: 1. A Lamp for burning Tallow, by Mr.

J. W. Bofwell; 2. An evaporating Furnace, by Curaudau; 3. A Gripe for

the Safety of Carriages, by Mr. Bowler; 4. A perpetual firft Mover; 5. A

new parallel Rule.

I. Description of a Tallow Lamp, which regulates its Supply by a spontaneous

Movement. By Mr. John Whitley Bofwell. Communicated by the In-

Page 145

ventor

II. Account of a fuccessful Cafe in which Deafnefs was cured by Puncture of the

Membrana Tympani. By M. Maunoir, of Geneva. Communicated by

Alexander Marcet, M. D. Phyfician to Guy's Hospital
149

III. Letter from Mr. Timothy Sheldrake, expofing the Errors of M. Tingry

respecting Copal Varnishes; with fome farther Inftructions concerning the

fame

151

IV. Reply to Mr. Dalton, on the Conftitution of Mixed Gafes. By Mr.

John Gough

160

V. On the apparent Size of the horizontal Moon. In a Letter from Mr.

Ezekiel Walker

164

VI. Defcription of the Ship Economy, 200 Tons Measurement, built on the im-

proved Conftruction of Mr. J. W. Boswell

166

VII. Concluding Remarks on the Computation of Tables of Squares and

Cubes. In a Letter from E. O.

171

VIII. Letter from C. Wilkinson, Efq. on Galvanism and Electricity 175

IX. Method of preventing Accidents to Horfes and Carriages, in going down

Hills, by a Gripe or Clafp acting on the Naves of the Wheels of the Car-

riage. By Mr. W. Bowler

177

179

X. Obfervations and Experiments to elucidate the Operation of the Galvanic

Power. By Mr. Charles Sylvefter. In a Letter from the Author

XI. Memoir on the Origin of Wax. By Francois Huber, Member of the

Society of Natural Philosophy and Natural History of Geneva

XII. An Enquiry concerning the Nature of Heat, and the Modes of its

Communication. By Benjamin Count of Rumford, V. P. K. S. Abridged

from the Philofophical Tranfactions for 1804

XIII. Letter from Profeffor Veau-de-Launay to J. C. Delametherie, on fulmi-

nating Silver
203

182

193

XIV. Pyrotechnic Obfervations, with their Application to evaporating Fur-

naces. By Cit. Curadau, Correfponding Member of the Apothecaries So-

ciety of Paris, and Resident Associate at the Atheneum of Arts
204

XV. An Account of a curious Phenomenon obferved on the Glaciers of

Chamouny; together with fome occafional Obfervations concerning the Pro-

pagation of Heat in Fluids. By Benjamin Count of Rumford, V. P. R. S.

Foreign Affociate of the National Inftitute of France, &c. &c.
207

XVI. Account of two Sketches; viz. one for a perpetual Motion, and the

other of a jointed Parallel Rule, which has no fide Deviation. In a Letter

from R. B.

-

212

214

217

XVII. Familiar Account of the Method of eftimating the Value of a Steam-

Engine in Horse-powers as they are called. By a Correspondent

XVIII. Experiments proving the Neceflity of atmospherical Oxigen in the

Procefs of Vegetation. In a Letter from Mr. John Gough

Scientific News, Accounts of Books, &c. 221-Frothing of Oil by Electricity,

ib.-Native Magnefia, 222-The Experienced Mill-wright; or a Treatife

on the Construction of some of the most useful Machines, with the latest Im-

provements. To which is prefixed a fhort Account of the general Principles

of Mechanical Powers. Illustrated with forty Engravings. By Andrew Gray,

Millwright, ib.--Practical Obfervations concerning Sea Bathing: to which

are added, Remarks on the Ufe of the Warm Bath. By A. P. Buchan,

M. D. of the Royal College of Physicians, 223.

DECEMBER,

Engravings of the following Objects: 1. A new Compenfation Pendulum, by

Mr. Edward Troughton; 2. An Inftrument for meafuring the Abforption of

Gafes, by Morozzo; 3. Diagram to explain the galvanic Energy upon Water,

by C. Wilkinson, Efq.; 4. Two Plates exhibiting a Condenfer of Forces, by

which the Action of a variable firft Mover is converted into a conftant Pref

fure, by Prony.

I. Defcription of a tubular Pendulum, having all the Properties of the Grid-

iron, but being more compact as well as more fteady in its Motions. In a

Letter from Mr. Edward Troughton, the Inventor

Page 225

II. Letter from W. Jeffop, Efq. on an Improvement in the Procefs of Blasting

Rocks with Gun-powder

230

III. On the Mucilaginous Matter of certain Vegetables, and their Use as a

Subftitute for Gum Arabic; by Mr. Thomas Willis; being a Continuation

of Experiments made upon the Subject by him, in Addition to those for-

merly published in the Tranfactions of the Society of Arts
232

235

237

IV. Examination of Mr. Ezekiel Walker's Experiments and Theory of the

Enlargement of the Horizontal Moon. In a Letter from C. L.

V. The Method of preparing Chinese Soy. By Michael de Grubbens

VI. On the Laws of Galvanifm. In Letters from C. Wilkinson and Thomas

Harrison, Efqrs.
240

VII. Remark upon an Affertion of Lavoisier, which has been repeated by

eminent Chemifts. By P. Prevoft, Profeffor at Geneva, and Correfpondent

with the National Inftitute of France

247

VIII. Account of a Memoir on chamoying of Leather. By M. Seguin 251

IX. Analyfis and Decompofition of a Liquor employed to render Stuffs im-

permeable to Water. By M. Vauquelin

252

X. New Experiments on Abforption by Charcoal, made by Means of a new

Machine. By C. L. Morozzo

XI. On the Commerce of Hens Eggs, and on their Prefervation.

Parmentier

-

255

By M.

264

XII. Method of giving the Colour, Grain, and Hardness of Steel to Copper.

By B. G. Sage

267

269

XIII. Obfervations on Mr. Gough's two Letters on Mixed Gafes

XIV. Some Account of a Condenfer of Forces, or a Method of obtaining the

greateft poflible Effect from a first Mover, of which the Energy is fubject

to Increase or Diminution within certain Limits; and in general to vary

at Pleasure the Reliftance to which the Effort of the firft Mover forms an

Equilibrium in any Machine whatever, without changing any Part of the

Conftru&tion. By R. Prony

275

XV. Abstract of a Memoir on the Poffibility of obtaining Pruffiate of Potash

free from Iron; the Unalterability of the Pruffic Acid at high Temperatures;

and the true Nature of the Combinations of this Acid with different Bafes.

By Bucholz.
278

XVI. Obfervations on the Caufe which augments the Intensity of the Sound

in Speaking Trumpets. By J. H. Haffenfratz
283

XVII. Account of Cerium, a new Metal found in a Mineral Subftance from

Baftnas, in Sweden. By W. D'Hefinger and J. B. Bergelius
290.

Scientific News. 301-Extract of a Letter from Mr. Bode, Aftronomer Royal

at Berlin, to Mr. A. F. Thoelden, ib.-Experiment on the Heat which is

developed during the compreffion of the Air, 302-Extract of a Letter from

Profeffor Prouft to J. C. Delainetherie, ib.-Method of obtaining pure Cobalt.

By Tromsdorff, 303-Method of Coating Copper with Platina. By Strauss,

ib.