Eremacausis, case of, 196

Etzler's mechanism for propelling vessels by
wave power, 88

Evaporation, experiments on, by Mr. Houlds-
worth, 463

Ewbank, Thos. Esq., on review of his Trea-
tise on Hydraulics, 103

Falling bodies, law of, 356

Faraday's, Professor, ventilating lamp, 236,
246, 271

Galvanic battery, cheap, 148

Galvanism, blasting by, 20, 208, 320
Gas-burner, Luntley's, 155

Gas illuminations, coloured, how to produce,
243

Gas and salt mine, 320

Gas-lamp ventilator, Rutter's, 456

Gases, Saunders' machine for the compres-
sion of, 83

Gibbons's improvements in the construction
of blast furnaces, 464

Gibson, J. B. Esq.'s, improvements in the
manufacture of salt, 465
Glasgow water supply, 105

Glass tubes, splitting of, 298, 339, 359
stained, historical notices of, 379
Gold, native, great mass of, 384
Gold-mines of Russia, 480

Goodwin sands, iron beacon erected on, 303
Green, Mr. C., observations by on aërial
ascent of August 1, 124

Green varnish, 277

Griffiths', Dr., discoveries in optics, 448
Guitard's railway carriage buffer, &c. (See
Marchal)

Gun, self-priming, Needham's, 352
Gunnery:-Mr. Holdstock on rifled shot,37

Hawkins, J. I., Esq., on use of hogs' lard
oil for lubricating machinery, 154, 210;
Perkins's marine propeller, 210; forma-
tion of concrete, 215; friction of water
against water, 216; steel pen wipers, 325
Health of towns, 313

Heat, Dr. Andrews' new law of, 172

-theory of, by Arthur Trevelyan, Esq., 451
Heineken, N. J. Esq., on free reed musical
instruments, and organ building, 5
Heliotrope and lantern, American, 102
Hempen and wire ropes compared, 16
Hennessey, Mr. H., new method by of mea-
suring distances, 276; on the water power
of Ireland, 401

Hill and Cheetham's can pressing weight and
plunger, 380

Hill's ophicleide organ stop, 208
Hill's, Mr. L., improvements in the manu-
facture of iron, 447

Hindle, Mr. R. Jun.; design for construc-

tion of safety valve and mercurial gauge,
Hobbs, Mr. John, inventions by, for the
preservation of life and property in case of
shipwreck, 113, 129, 230

Hodgkinson, Eaton, Esq., on the inelas-
ticity of bodies, 201

Hogs' lard oil, 154, 210

Holdstock, C. A. Esq., on rifled shot, 37
Holland,manufacture of steam-engines in, 432
Homersham, Mr. S. C. H., on pump
valves, 249

Hope, D. T. Esq., on granite, wood, and
other pavements, 235

Horse power, experiments on, 138
Hosiery, Keene's improvements in, 30
Hospital purifying apparatus, Dr. Payerne's,

320

Houldsworth, H. Esq., experiments by upon
evaporation, 463

Howard patent, the, for refining sugar in
vacuo, 352

Hunt, R. Esq., new photographic process
called chromatype discovered by, 170;
experiments by, on the changes effected by
light in bodies, 212; experiments by, to
ascertain the quantity of air which enters
the fireplaces of Cornish engines, 369;
on a light of a peculiar character, emanat-
ing from the edge of the sun, 379
Hunt's brickmaking machinery, 190
Hunter's submarine propeller, 10
Hurwood, Mr. George, C.E., on the drain-
age of Ipswich, 287

Motive power, new, Drake's, 304
Muntz's yellow copper sheathing, 367
Mushet, David, Esq., report by, of experi-
ments on cast and malleable iron at the
Milton iron works, 280
Musical instruments, free reed, 5

Napier's metallic cloths, 430

Naphtha, sophistication of alcohol by, and
Dr. Ure's rule for detection of, 12
Napoléon problem, the, 357, 455
Needham's self-priming gun, 352
Nene estuary embankment, 363

New York exhibition of arts and manufactures, 464 ROY JUNTES

Noton, M., Esq., chimney pyrometer invented by, 326; experiments with, 472 Numbers, mechanical square of, 4, 21, 39, 62 46

Oil, hogs' lard, excellent for lubricating machinery, 154

Oils, fish, processes for the purification of, 110

Omnibuses, Ranwell's apparatus for regis-
tering number of passengers by, 429
Ophicleide organ stop, Hill's, 208
Optics, Dr. Griffiths' discoveries in, 448
Ores, Longmaid's improvements in treating,

427

Organ building, 5, 99, 208

Birmingham, 240

self-playing, American, 464

Pacific, islands of the, peopling the, 432 George, Esq., plan by, for fitting all

Palmer life-boats, 342

Panama, isthmus of, canal across, 80 Paper cloth for maps, &c., Chapman's, 270/ irridescent silver, how to make, 277 Paracyanogen, formation of, 172 Parkyn's improvements in steam-engines, 289

Parlby's, Major, breakwater, 24

Parson, P. M. Esq., C.E., his locomotive expansive apparatus, 49, 51; metallic packing for steam-engine pistons, 104; double cylinder engine, 161

vii

Parsons and Bunning, Messrs., on working locomotives expansively, 51 776

Patents, English, law of, 22, 56, 118, 144 Cases: Soame's cocoatent 28; Wright's patent for!!

nut oil

encaustic tiles, 29; Clarke's enamelled hollow war 144; Stead's wood-paving, I

206, 446; Botten's protector gas-meter, 239; Muntz's yellow copper sheathing,onl 367; Heath's improvements in the manufacture of steel, 368; Hill and Cheet-I ham's can pressing weight and plunger, 1

380

French law of, 182

new, for England, 32, 92, 159, I

254, 319, 382, 478

Scotland, 16, 96, 208,

42, 269, 427

Passenger propelled locomotives, 389 Paving with granite, wood, &c., 235; the diagonal system, 365

Payerne's, Dr., hospital purifying appara tus, 320

Peacock, Mr. Anthony, solution by of Dr.

Pell's algebraic problem, 294, 364, 398-Pell's, Dr., Algebraic problem, solutions of, 294, 359, 361, 398

Pellatt, F., Esq., on coating of iron with zink, 195

Penn and Co., Messrs., oscillating engines made by, for H. M. S. "Black Eagle," 222

Perkins's screw-propeller, 210, 293
Perring, Mr. J., on brickmaking of the
ancient Egyptians, 196
Phillips's aerodiphros, 160
Photography, 170, 212

Pilbrow's, Mr., theory of the force of efflu-
ent currents of steam, 278
Ploughing by steam, 255

Pole, William, Esq., C.E. on the pressure and density of steam, 245

Poplin trade, Irish, 153

Portmanteau, marine safety, Irvine's, 288, 449

Poultry feeder, mechanical, Bollenot's, 360
Printing at sea, 255

PROPELLING AND PROPELLERS :-→ ·

Hunter's submarine propeller, 10; Perkins's screw, 210; combination in the schooner "Margaret' of sailing, steaming, and screw-propelling, 240; Earl of Dun donald's plans, 269; use of two screws fore and aft suggested, 277; historical notices of screw propelling, 292, 340, 359, 388; 1 Chatterton's paddle-wheel, 303; Capt. Woodley's capstan paddle-sail, 337; Mr. R. Walker's mode of propelling, 376; the -"Mermaid" screw steamer, 400; Bodmer'simprovements, 431; Spanish scheme,

448

I

Prosser's dry method of making bricks, tiles,
tesseræ, &c., 190, 378

Prussiates of potash, Young's apparatus for
manufacture of, 385

Pumps, Wheeler's, 6; Shalders's, 41; Wal-
ker's, 103, 339; Schwanfelder's, 381;
Robson's, 427

Pumps, valves for, 239, 249
Pyro-hydro-pneumatic apparatus, Clark's,
145, 176

Pyrometer, Chimney, Noton's, 326, 472

Rafts, safety, Hobbs's, 113, 129

RAILWAYS AND RAILWAY CARRIAGES :-

Rankine's method of laying down curves,
13, 167; Lieut. D. Rankine's spring
contractor, 14; York's hollow axles, 25;
Wydroff's tube railways and solid wheels,
&c., 45; the atmospheric system, 149,
267, 334, 345, 464, 476, 480; Capt.
Woodcock's axles, 194; Beattie's wheels,
208; Marchal's buffer carriage, 273;
number of English locomotive engines in
use on the Continent, 288; English
and Belgian coke, 288; iron and wood
railways, 416; Marchal's further im-
provements in rails and carriages, 433
Rankine, William J. M., Esq., C.E., me-
thod by of laying down railway curves,
13, 167

Rankine's, Lieut. D., railway carriage spring
contractor, 14
Ranwell's apparatus for registering number
of passengers, by stage coaches, &c., 429
Reece's life-preserver, 341
Rhododendron, the, a good thermometer,
160

Rifled shot, 37

Ritchie, Robt., Esq., on ventilation of
sailing and steaming vessels, 418, 438
Roads, construction and maintenance of,
235, 389

Robson's hydraulic apparatus, 427
Roofs, Loat's mode of constructing, 271
Rooke's improvements in the manufacture
of mineral colours, 269

Rope, hempen and wire, comparative merits
of, 16

Manilla, 234

Rollinson's method of manufacturing malle-
able iron shot, 241

Rosse's, Earl of, leviathan telescope, 304
"Royal George," the, completion of opera-

tions for recovery of the wreck of, 395
Ruggle's shoe manufacturing machine, 336
Russell, John Scott, Esq., on the application
of the laws of sound to the construction
of buildings, 155; on the wave line in
ship building, 213

Russia, gold mines of, 480

Rutter, J. O. N., Esq., salubrious light, and
gas-light lamp ventilator, invented by,

456

Sailcloth sewing machine, 81

Salt and gas machine, 320

Salt, Gibson's improvements in the manu-
facture of, 465

Saunders, Dav. A. R., Esq., description by,
of a machine for compression of gases, 83
Savage, Alfred, Esq., on organ building and
free reed instruments, 99

Seaward and Co., Messrs.; the Penelope
engines, 47

Schwanfelder's hydraulic machine, 381
Scoresby, Dr., on artificial magnets, 211
Screw-cutting, case in, 136, 219, 398

Screw propelling, 277; historical notices of,
292, 341, 359, 388
Screws, lathe-cut, 224

Sewing sailcloth, machine for, 81
Shaft, immense, 304

Ship-building: water-tight bulkheads, 160,
200; employment of iron, 180; the wave
line, 213; necessity of strengthening the
fastenings, 443

Ships' pumps, 42, 77, 119, 143, 219
Shipwrecks, Report of House of Commons

Committee on inventions for the preserva-
tion of life and property in cases of, 329;
additional suggestion, 359

Shires, Mr. W., simple method by, of mak-
ing lunar observations, 297
Shoemaking, modern, false principles of,
417, 442

Shoes, Barber's horn soled, 269

280

soles of, Hutchings' improvements in,

Ruggles' machine for manufacture of,

336
Shot, rifled, 37

malleable iron, 241

patent, Watts's, 446

Silk trade of Ireland, 153
Simms, F. W., Esq., C.E., on horse power,
138; on brickmaking, 188

Slide rule, practice of the, 458

Smith's improvements in the manufacture
of bricks, 42

prismatic camera, 265

Archimedes screw-propeller, 293
Smith, Captain Geo., paddle-box safety
boats invented by, 331

Smoke nuisance, the, 32, 112, 156, 287,
313, 362, 432, 464

Soames' cocoa-nut oil patent, 28
Solar lamp improved, 232

Sound, laws of, application of, in the con-
struction of buildings, 155

Spencer, Mr. Thos., on the formation of
cyanogen, 173

Spinning jenny riots, 447

Squire's tubular steam-boiler, 1

Stables, wood paving for, Crannis and
Kemp's, 328

Stage coaches, Ranwell's apparatus for re-
gistering number of passengers by, 429
Stalagmite, table of, 432

Hindle's safety valve and mercurial
gauge, 8

Wilson's improvements in valves for
working expansively, 43
Morris's ditto, 43

Parsons' expansive apparatus, 49, 51; me-
tallic packing, 104; double cylinder en-
gine; 161

"Mammoth engine" built at the Hayle
foundry for Holland, 144
Maudslay's double cylinder engine, 177;
annular, 221
Professor Moseley's

experiments with
Morin's velocity measuring machine,

215
Penn and Co.'s oscillating engines, 222
Direct-action engines, 244, 266, 289, 302
Earl of Dundonald's plans, 269
Parkyn's improvements, 289
Napier's steeple engine, 302
Beale's rotary, 321
Tregaskis's indicator, 253

Cornish engines, quantity of air con-
sumed by, 373

Batchelder's dynamometer, 401
Manufacture of steam-engines in Holland,
432

ix

The Victoria and Albert steam yacht, 177,

204, 331

Iron steamers, 180

Princess Alice, 221, 335, 352, 364, 444
Black Eagle, 222

Loodhiana, 222

Margaret (with auxiliary steam power, and

screw propeller), 240

Fire Queen, 288

Great Northern, 288

Thames and Clyde steamers, 312
Thames, 312

Dee, 312

Captain Smith's paddle-box safety boats,
331

Great Western, 368

Princeston (U. S. frigate), 368
Steam tugs on canals, 384
Mermaid, 400

Lieut. Morrison's "Leviathan," 400
Ventilation of vessels, 418, 438

Strengthening the fastenings of ditto, 443
Firebrand, 475

Janus, 479

Steam ploughing, 255

Steam travelling on common roads, 124,
232

Steel, action of air and water on, 196
Steel-pen wipers, 297, 325

Steel-pens, protection of, 453

Stirling's air machine, 77

Stollmeyer, Mr. C. F., plan by, for a float-
ing island, 289

Stocking frame worked by dogs, 336

Stoves :-Wolferstan's, 8, 168; King's, 168;
Sylvester's, 313; Jeffery's, 362
Strength of materials, 201
Stuckey's patent filter, 17

Sugar manufacture, Crosley and Stevens'
improvements in, 31; Howard's vacuum
plan, invented by Davy and not Howard,
352

Sulphur, separation of, from other mineral
substances, 428, 444

Sun, the, Professor Draper's observations
on the rays of, 170, 171; peculiar light
emanating from the outer edge, 379
Sunderland, Thomas, Esq., screw propeller
invented by, 295

Suspension bridges, construction of, 57,-
114, 133, 225, 266

Sylvester stove, the, 313; mode of water-
proofing walls, 479
Syrup, iron, 80