Keese, O. on a modification in the manner of working air pumps,

213

Keys for railways,

78

Koechline's turbine, Description of

222

Laboratory, Hydrogen furnace for the vitrification, &c. in the

135

Leaden bullets, Manufacturing of, by rolling

357

Le Brun. N., Account of raising the spire of the church of the Nativity, by
Liquefaction and solidification of gaseous bodies,
Locomotive engine on the Dover railway, Explosion of a

368

350

220

Manchester and Leeds railway, Explosion of a .
Richmond, Report on the explosion of the

Machine made paper, On the electricity developed in the manufacture of
Magnetizing steel bars, Method of .

Manchester and Leeds railway, Explosion of a locomotive on the

Mercury, Notice of the transit of

298

16

352

346

298

420

Metallic mirror, Oxide of silver precipitated on glass in the form of a
Metals, Cement to prevent the oxidation of-patent,

Mill at Oldham having east iron girders and brick arched floors, Fall of a
Mineralogy, Notice of Alger's, Phillips'

289

259

Observations, Meteorological

144

Oldham, Falling of a mill having cast iron girders and brick arched floors, at
Optical purposes, Manufacture of glass for

Oxide of silver precipitated on glass in the form of a metallic mirror,

Paper, Electricity developed in the manufacture of machine made

machines, On the regulation of

351

352

123

Parliament, Description of the roofs on the new houses of
Passot's turbine, Description of

73

225

Phillips' Mineralogy, Notice of Alger's

Photographic process, Description of the amphitype, a new

Piano forte, Report on Rickett's improvement in the

Pigment, or cement, to prevent oxidation of metals,-patent,

Pneumatic apparatus for converting salt water into fresh,-patent,
Portrait on porcelain, Enamel

Quarterly Journal of Agriculture and Science, Notice of the American

Railway accident, cause of the great Versailles

trains, Resistance of

Railways, Description of Ellis' turn table for

--

Rain, Quantity received in gauges at different heights,

Rays of heat, Absorption of, by the terrestrial atmosphere

Read and write, Apparatus to enable the blind to

Rigid bodies, Experiments on the elasticity of

Roofs on the new houses of parliament, Description of the
Ropes, Experiment with wire

on the Allegheny portage railway, Wire

340

369

78

79

306

145

419

355

143

349

77

313

212

Rotary engines, Experiments with screw propellers and

132

Royal Bavarian academy, Prize essay

122

Science, Notice of the American Quarterly Journal of Agriculture and
Screens for carding engines, Remarks on

340

288

Screw propellers, Experiments on board steam ship Rattler with Smith's

and rotary engines, Experiments with

Screws, Prof. J. Dean's essay on the diameter of

Sheathing of ships, &c., Composition applicable to the manufacture of-patent,

141

132

202

396

Ships' compasses, Improvement in .

Silver precipitated on glass in the form of metallic mirrors, Oxide of

405

351

139

216

215

Solidification and liquifaction of gaseous bodies,

Sound, Adaptation of public buildings to the propagation of

350

1

Statistics of hosiery,

Spinning mill at Dundee, Accident in a

Spire of the church of the Nativity, Raising the

218

368

359

140,412

361

chimney and boiler on board the Portsmouth, Report on the explosion of the

--, Problems on .

31

73

149

305

346

142

214

357

Sulphur, iron and copper, Prize essay on atomic weights of

122

Typographic process, Printing colors by the

Versailles Railway accident, Cause of the

Vibration, Alteration in iron by long continued

Water in different materials, Boiling point of

Explosive alarm whistle--Allen's

Orthochronograph for ascertaining correct time-Webster's,

Sheathing ships, Composition applicable to-Hood's,

Water, Apparatus for converting salt into fresh-Clark's

Telegraphs, Improvement in electric—patent,
Tension of some condensed gases, Force of

Tides, Remarks on solar

Time, Orthochronograph for ascertaining correct-patent,.
Topaz, Crystals in the cavities of

Transit of Mercury, Notice of the
Tunnel, Account of an Ancient

Turbines, Description of several

Turn tables for railways, Description of Ellis'

Type setting machine, Remarks on the

Ventilation of the coal mine goaf,

Specifications of Patents.

Cement, or pigment to prevent oxidation of metals-Duetch's,
Compasses, Improvement in ships'-Dent's,

Electric telegraphs, Improvement in-Heighton's

Funnel for cure of smoky chimnies - Boyd's, .

61

405

403

404

406

402

396

398

¡403

356

215

402

142

420

307

221

306

287

216

366

369

139

OF

THE FRANKLIN INSTITUTE

OF THE

State of Pennsylvania

AND

AMERICAN REPERTORY

O F

MECHANICAL AND PHYSICAL SCIENCE, CIVIL ENGINEERING, THE ARTS AND MANUFACTURES,

AND OF

AMERICAN AND OTHER PATENTED INVENTIONS.

EDITED

BY THOMAS P. JONES, M. D.,

Mem of the Am. Philos. Soc.; of the Acad. of Nat. Sci., Philad.; the Am. Acad. of Arts and Sci., Mass., the Nat. Inst. for Promotion of Sci., Washington, &c. &c. &c.

COLLABORATORS.

Reporter of American Patents,

C. M. KELLER, late Examiner, Patent Office, Washington.

THIRD SERIES.

VOL. X.

PHILADELPHIA.

PUBLISHED BY THE FRANKLIN INSTITUTE, AT THEIR HALL.

1845

Remarks on Barlow's Investigation of "the Pressure of Banks and Dimensions of Revetments." By D. P. WOODBURY, Lt. U. S. Engineers.

Barlow's "Treatise on the strength of timber, cast iron, and other materials," is a work of great merit, embodying a vast amount of information of the utmost importance to all engineers and builders.

It is a work too, we believe, extensively used both in England and in this country; and this fact, we trust, will justify the purpose of this paper, that of pointing out some errors in that author's investigation of "the pressure of banks and the dimensions of revetments." From the fourth edition (London,1 837,) page 196 and subsequent, we make the following extract: