Mallet's Mr. R., method of obtaining a
vacuum for atmospheric railway purposes,
193, 209, 224, 253, 305, 364, 385, 406
Manchester, smoke nuisance at, 192
Manufactures in Canada, 144
Manures, Liebig's patent, 313
Mars, the planet, 372 €

Matches, friction, Smith's patent improve-
ments in, 192

Mathematical prodigy, 415

Matter, minuteness of, 340

Maudslay and Field's, Messrs., patent hori-
zontal double cylinder engine, 289
Meat, how to preserve fresh, 27
Mechanical fallacies, 134

problem, solutions of, 163, 201
geometry, 190

Memory, ancient art of, 46
Mensuration, centrobaric, 19, 132

-, problem in, 247

Metallic reverses for the electrotype, im-
proved method of casting, 84
Metals, Weiger's patent improvements in
the amalgamation of, 78

new anti-friction, 224
Mill, ancient portable grist, 46
tide, Ross's patent, 285

-, saw, Stigleman's patent, 317
Mill wheels, Burt's governor for regulating
the movements of, 29

Millar's experiments in naval architecture,
131

Milligan's plan of preventing accidents in
coal mines, 244

Mines, employment of electric light in coal,
131, 189

Morse's, Professor, electric telegraph, 250
Mortar, ancient, 46

Motive power, Armstrong on the employ-
ment of a column of water as, 402
Multiplication table, the, curious property
of, 36

Musical stringed instruments, application
of springs to, 92

Muzio's patent for directing the course of
balloons, 207

#1

Rotary press,
perial, 81

Rowing by steam,

Royal Society,

408

411

and steam

Lyttleton's aquatic, 354

as auxiliaries to sailing

vessels, 63, 255, 257

Sea, level of the, 318

Sea water, action of, upon iron, 89
Secret writing, 27

Seller's patent for working vertical forge
hammers, 394

Senegal, gum, Fouquet's patent substitute
for, 414

Septenary system, Jopling's, 190

Sherwin and Co.'s imperial rotary press, 81
Silk grown at Norwich, 144

Silvering glass, new process for, 190
Skinning, diagonal, 320

Smoke-elevator, Boswell and Rickets' regis-
tered, 17

Smoke nuisance at Manchester, 192
Smith's patent improvements in friction,
matches, 192

Soap, Power's patent improvements in the
manufacture of, 57

Frost's improvements in, 29
American locomotive, 112
direct action and paddle

for draining Haerlem Lake,

Rotary, 287

Messrs. Maudslay and Field's

patent horizontal double cylinder, 289
See also Railways.

Steam-navigation, canal, 80

in the United States, 400
of the Amazon, 432.

Steam dredging machine, Sir Samuel Ben-
tham's, 113

and screw as auxiliaries to sailing i
vessels, 60

hammer, Nasmyth's, 72, 754

STEAM VESSELS

How to calculate the run of, 4.0
Building in America, 96

Avon, 271

Bee, 96, 270, 316

Fairy, 30, 48, 60, 80, 95, 414,
Great Britain, 151, 170, 182, 256,
301, 308, 349 ༈ * ° * b 1
Janus, 112, 287, 373
Marmora, 224, 240
Massachusetts, 255, 257*

Meteor, 48, 60, 80..
Novelty, 287.

Oregon, 296

Princeton, 217

Queen, 143

Wonder, 96, 414, 432

Water Lily, 31, 48, 224

Pat

R

Steel, Thos., Esq., on submarine exploration,
3421

Steel and iron, Brown's patent improve-
ments in combining, for carriage springs,
58

Stenhouse on artificial ultra-marine, 445
Steven's scull propeller, 204
Stigleman's patent improvements in saw
mills, 317

Stocking frames, history of the various im-
provements in, 100

Stone columns, strength of, 73

, artificial, Williams' patent improve-
ments in the manufacture of, 414
Storer's delineator, 93

Stove, yacht, 89

103

Dr. Arnott's adapted to workshops,

Straps, Frashure's patent buckles for con-
necting, 395

-, Beverley's patent ditto, 395
Sugar, ancient mode of refining, 46

Sugar boiling apparatus, Ronald's patent,
50, 78

Hurd's patent for separating liquids
by centrifugal force from, 191
Sulphuric acid, consumption of, 64

Gamble's patent improve-
ments in the manufacture of, 79
Suspension bridges, 352

Vagary, atomic,

144

Valves, Beaumont's anti-friction, 88

ix

-, Underhay's patent improvements in,
375

T

Vapour-bath, ancient, 46

Vapours of chemical works, Turner's me-
thod of purifying, 12

Velocipede, new railway, 144, 191

of, 192

Swimming, great feat in, 400

Switches, Nicoll's patent safety, 317
Syphon, Johnson's patent improvements in
the, 395

valve, 8

Voltaic reduction of alloys, 11

* ?