INDEX.

A

Addendum, 202

Air, Pressure of, 20

Aluminum, Compensation with, 48

Anchor Escapement, 141

Angular Measurement, Peculiarities of, 102

Apparent Time, 348

Arbors, Polishing Steel, 232

“Straightening Bent, 231

Arc of Escapement, 93, 109, 115, 127, 138, 145, 153, 164, 186, 469

Armatures, Adjustment of, 389, 409

Astronomical Clocks, 493

“Day, 348

Auxiliary Weights, 37

B

Balance, Vibrations of, 180

Banking, 90, 156, 160, 170, 176

Barometric Error, 20

Barrels, 244, 267, 465, 485

“Chiming, 370

Batteries, 380

“Dating, 392

“Grading, 384

“Making, 383

“Position of, 385

“Wiring, Methods of, 385

Beat, to put a Clock in, 89

Bells, 369

“ Ships, 315

Brocot’s Calendar, 359

“Visible Escapement, 127, 128

Bushing, 476

C

Cables, Clock, 269

“Lengths of, 271

Calculations of Weights, 57

Calendars, 347

“Brocot’s, 359

“Gregorian, 349

“Julian, 349

“Perpetual, 353

“Simple, 350

Carillons, 372

Case Friction, 448

“ Temperature, 450

Cases, 446

“ Gilding, 459

“ Marble, 460

““ to Polish, 461

“ Polishing, 457

“ Precision Clock, 447

“ Regulator, 463

“ Restoring old, 455

Cement for Marble, 460

“ for Dials, 438

Center Distances, 110, 200

“ of Gravity, 18

“ of Oscillation, 13

“ Springs, 96, 294

Chain Drives, 271

Cheap Clocks, to clean, 187

Chime Barrels, to mark, 371

Chimes, 339, 370

“ Cambridge, 372

“ Carillon, 372

“ Electric, 420

“ Tubular, 374, 422

Circle, Pitch, 202

Circular Error, 21

“ Pitch, 215

Cleaning Cheap Clocks, 187

Clocks, Astronomical, 493

“ Cuckoo, 319, 321

“ Designing, 8

“ Four-hundred day, 91

Clocks, Glass of, 462

“Repeating, 332

“Room, 452

Cock, 482

Collets, 234

Compensated Pendulum Rods, 40

“ Rod, Flat, 41

“ Rods, Tubular, 48

Compensation, 450

Compensating Pendulums, 23

““Bracket for, 32

Compensating Pendulums, Principles of Construction, 27

Compensating Pendulums with shot, 36

Compensating Pendulums, Wood Rod and Lead Bob, 32

Compensation Pendulums, Wood Rod and Zinc Bob, 28

Compensation Pendulums, Aluminum, 48

Cones, Rusting of, 190

Construction of Dials, 426

Contacts, Dial, 423, 425

“Electric, 396

Contrate Wheel, 171, 375

Conversion, Table of, 18

Cords, 268

“ Lengths of, 270

Count Hook, 301, 304, 310

“ Wheel, 301, 304, 315

““ Train, 300

Crown Wheel, 171

Crutches, 87, 472

Cuckoo, Adjustments of, 326

“Bellows, 328

“Clock, Names of Parts, 323

“Motion Work, 296

“Repairing, 327

Cutters for Clock Trains, 196

“Setting, 197

Cycloid, 21

Cylinder Clocks, Examination of, 171

Cylinder, End Shake, 170

““ Proportion of, 149

“ Side Shake, 167

“ Teeth, Shape of, 183

Cylinders, Weight of, 37

D

Day, Astronomical, 348

“ Sidereal, 348

“ Solar, 348

Dedendum, 202

Dennison Escapement, 150

Depolarizers, 381

Depthing, 200

“ Tool, 477

Designing Clocks, 8

Detached Lever Escapement, 184

Dials, Construction of, 426

“ Contacts, 423, 425

“ Enamel for, 431

“ Phosphorescent, 437

“ Repairing, 432, 438

“ Secondary, 417

“ to Clean, 436

“ “ Silver, 434

“ Varnish for, 438

Distances, Center, 200

Drawings, to read, 98

Draw of Teeth, 194

Drill, Pinion, 249, 251

Drop, 107

E

Effect of Temperature, 62

Eight Day Trains, 299

Electric Chimes, 420

“Clocks, 376

““Synchronizing, 400, 413

“Contacts, 396

Elements, Mechanical, 98

Enamel for Dials, 431

End Shake, of Cylinder, 170, 175

End Stones, 477

Epicycloid, 206

Equation of Time, 365

Error, Barometric, 20

“ Circular, 21

“ Temperature, 22

Escape Wheel, Sizes of, 109, 133, 155, 164

““ To make, 109, 120, 135, 138, 150, 155, 162, 164

Escapement, Brocot’s, 127, 128

“Cylinder, 163

“Dennison, 150

“Detached Lever, 184

“Drum, 148

“Graham, 109

“Gravity, 150, 161

“Le Paute’s Pin Wheel, 135

“Pin, 185, 193

“Recoil, 141

“To draw Graham, 113

““ Pin Wheel, 138

““ Gravity, 152

“ Western Clock Mfg. Co., 193

Examination of Cylinders, 171

Expansion of Metals, 22

F

Fan, 308, 326

Fly for Gravity Escapement, 158

Frames, Making, 261

“Thickness of, 474

Four-hundred Day Clocks, 91

Friction, Disengaging, 203

“Engaging, 203

“of Teeth, 132

“Springs, 294

G

Gathering Pallet, 338, 344

Gilding, 459

Gong Wires, 369

Graham Escapement, 109, 467

Gravity, Center of, 18

“ Escapement, 150

Gregorian Calendar, 349

H

Half Hour Striking Work, 334, 342, 345

Hammers, 367

“ Hardening, 198, 480, 482

“ Springs, 368

“ Tail, 298, 301

Hands, 439

“ Proportions of, 440

“ To Balance, 442

“ To Blue, 444

Hour Rack, 335

“ Snail, 296, 334

“ Strike, 342

“ Wheel, 96, 293, 296, 325

Hypocycloid Curves, 206

I

Iron, Expansion of, 57

Information, Need for, 3

Isochronism, 469

J

Jeweling, 475, 477

Jewels, Pallet, 126

Julian Calendar, 349

L

Lantern Pinions, 235

Lathe, Slide Gauge, 241, 243, 246

Laws of Pendulums, 11

Lead, 22, 32

Leap Year, 349

Length of Pivots, 199

Le Paute’s Escapement, 135

Leverage of Wheels, 99

Lift, 106

Lifting Cam, 301, 331

“ Piece, 331

“ Planes, 116

“ Pins, 186

Lock, 107

Locking Hook, 301

Losing Time, 192

Lunation, 365

M

Magnets, Arrangement of, 378, 386, 389, 395, 401, 406

Mainsprings, 272, 274, 277, 278, 279, 280, 281, 282

“Breakage of, 281

“Buckled, 277

“Cleaning, 277

“Clock, 288

“Coil Friction, 277

“Fusee, 279

“Importance of Cleaning, 274

“Length of, 280

“Loss of Power, 274

“Maintaining Power, 285, 291

“Oiling, 278

“Stop Works, 282

Maintaining Powers, 285

Mean Apparent Time, 348

Mean Time, 348

Measuring Wheels, 195

Measurement, Angular, 102

Mechanical Elements, 98

Mercurial Pendulums, 53, 60, 69

““For Tower Clocks, 65

Mercury, 53, 56, 66, 70

Metals, Expansion of, 22

“Weight of, 37

Millimeters Compared with Inches, 18

Minute Jumpers, 417

“Wheels, 96, 293, 296, 325

Month Clocks, 260

“ Sidereal, 349

“ Synodic, 350

Moon, Phases of, 365

“ Train, 365

Motion Work, 96, 293, 296, 325

N

Need for Information, 3

Numbers, Conversion of, 201

Nut, Rating, 42, 50, 66

O

Oiling Cables, 269

Oscillation, Center of, 13

Overbanking, 90, 156, 160, 170, 176

P

Pallet Jewels, 126

Pallets, 106, 115, 121, 126, 130, 135, 139,

141, 144, 149, 153, 186, 193, 470

Pallets, To make, 119, 126

Pendulum, Isochronous, 470

“Lengths, Table of, 10, 16

“Rieffler, 49, 75

“Rods, 262

“ “ Compensated, 40

“Compensating, 23

“Electric Driven, 376

“Laws of, 11

“Mercurial, 53, 60, 69

“Sidereal, 493

“Torsion, 91

Perpetual Calendar, 353

Phases of the Moon, 365

Pillars, Making, 240

Pinion Drill, Automatic, 249, 251

“ Making, 227, 252

““ Machine, Automatic, 245, 247

“ Canon, 293, 294, 295

“ Depthing, 206, 210, 217

“ Facing, 233

“ Hardening, 229

“ Lantern, 235

“ Tempering, 230

“ To Draw, 206

Pin Escapement, 185, 193

“ Wheels, 297, 301, 327

““ Escapement, 135

“““To Draw, 138

Pitch, Addendum, 216

“ Circle, 202

“ Circular, 215

“ Diametral, 216

Pivots, 488

“ Length of, 199

“ Proportions of, 167, 173, 199, 474

“ Side Shake, 199

Planes, Lifting, 116

Plates, Clock, 198

“ Thickness of, 474

Poising Balance Staffs, 189, 190

Polishing Steel Arbors, 232

Posts, Clock, 478

Power, 264, 265, 266, 267

“ Maintaining, 285

Putting in Beat, 89

R

Rack, Division of, 335

“ Striking Work, 331

Ratchet, 288

Rating Nut, 42, 50, 66

“ With Shot, 90

Reading Drawings, 98

Repeating Clocks, 332

Recoil Escapement, 141

Regulation, 79

Regulator Trains, 492

Regulators, Making, 463

Repairing Dials, 432, 438

Resistance Spools, 388

Rieffler Pendulum, 49, 75

Rounding-Up, 174, 221, 223

““ Rules for, 226

Run, 108

Rusting of Cones, 190

S

Screws, Clock, 483

Secondary Dials, 417

Self-winding Clocks, 376

Ship Bells, Striking, 313

Shot, Rating with, 90

Sidereal Day, 348

“ Month, 349

“ Pendulums, 493

“ Year, 349

Side Shake, Cylinder, 167

“ “For Pivots, 199

Silvering Dials, 434

Simple Calendar, 350

Sizes of Teeth, 211, 213, 237

“ “ Wheels, 201

Slide Gauge Lathe, 241, 243, 244

Snail, 296, 336

“ Division of, 337

“ French System, 342

“ Quarter Striking Work, 339

“ Striking Work, 330, 340

Solar Day, 348

Sparking, to Prevent, 386

Springs, Center, 294

“Clock, 273, 288, 307

“Friction, 294

“Hammer, 368

“Main, 272, 273, 274, 277, 278, 279, 280, 282, 307

Squares, Milling, 261

Standards, Importance of, 26

Star Wheel, 332, 335

Steel, Expansion of, 57

Stop Works, 282

Straightening Bent Arbors, 231

Striking from Center Arbor, 298

“To Correct, 306, 307

“Trains, 297, 308, 313, 323, 330

““ Half Hour, 298, 308, 313

““ Setting Up, 307, 310, 339

““ To Calculate, 297

““ Rack, 331

“Work, Repeating, 332

““ Snail, 330, 340

Supports, Pendulum, 86

Suspension, 81, 93

“Springs, 82, 93

Synchronizing, 400, 413

Synodic Month, 350

T

Table, Lengths of Pendulum, 12, 16, 17, 34, 258

“ of Expansions, 30

“ Inches, Millimeters and French Lines, 18

““Time Trains, 258, 339, 340, 492

““Weights and Metals, 37

Tangent, 104

Teeth, Friction of, 132

“ Shape of Cylinder, 183

“ Shapes of, 203

“ Sizes of, 211, 213, 237

Temperature, Effect of, 62

“Error, 22

Tempering, 229

Time, Apparent, 348

“ Equation of, 365

“ Losing, 192

“ Mean, 348

To Draw Anchor Escapement, 143, 145, 147

Top Weights, 39

Torsion Pendulums, 91

Tower Clock, Cables, 269

““Dials, Sizes of, 426

““Gravity Escapement for, 150

““Hands, 442

““Maintaining Powers, 285, 291

““Motion Work, 295

““Pendulums, 65

““Stop Works, 287

““Suspension, 65

““Time Trains, 258

Trains, 330

“ Electric, 389

“ Regulator, 492

“ Table of, 258

“ To Calculate, 257, 264, 297

Tropical Year, 348

Tubular Chimes, 374, 422

Turning Tools, 481

V

Varnish for Dials, 438

“ Remover, 456

Vibrations of Balance, 180

W

Warning, 306, 312

“ Pin, 306, 312

“ Wheel, 306, 312

Weight Cords, 268

Weight of Lead, Zinc and Cast Iron Cylinders, 37

Weights, 265, 319

“ Auxiliary, 37

“ Calculations of, 27

“ Top, 39

Wheel Contrate, 171, 375

“ Crown, 171

“ Hour, 296

“ Cutting, 254

“ Leverage of, 99

“ Measuring, 195

“ Minute, 96, 293, 296, 325

“ Sizes of, 201, 490

“ Stamping, 256

“ Star, 332, 335

“ Stretching, 226

Wires, Gong, 369

Y

Year, 348

“ Leap, 349

“ Sidereal, 349

“ Tropical, 348

Z

Zinc, 54

Big Ben

BIG BEN is the first and only alarm sold exclusively to jewelers. He is without exception the finest sleepmeter made—the best looking, the best built, the best running.

Big Ben is a beautiful thin model alarm clock standing 7 inches tall and mounted in a reinforced triple plated case. He is fitted with big strong easy winding keys, clean cut heavy hands and a large open winsome dial, distinctly visible across the largest room.

Big Ben rings just when you want and either way you want, intermittently for fifteen minutes, continuously for ten, and he rings with a jolly full-tone ring that will arouse the drowsiest sleeper.

Big Ben is rigidly inspected, six days factory timed and tested. He works only for jewelers and then only for certain jewelers—those that agree to sell him for not less than $2.50.

We pay his railroad fare on all orders for a dozen or more, we brand him with your name in lots of 24.

Height 7 inches. Dial 4½ inches. Intermittent or Long Alarm. Dealers’ names printed free on dials in lots of 24. Freight allowed on orders for one dozen or more.

Western Clock Mfg. Co.

New York La Salle, Illinois Chicago

HOROLOGICAL DEPARTMENT— Bradley Polytechnic Institute

THIS entire building used exclusively for instruction in watchwork, jewelry, engraving and optics, is thoroughly equipped with all modern tools for use in connection with the work as required in any up-to-date jewelry store. Competent instructors as heads of each department and several assistants, so that all may be kept busy. ¶ If you would like to get all or any one of the branches mentioned above, it will pay you to investigate Bradley. With our increased facilities we can take care of all who wish to come. ¶ Don’t put off till tomorrow or next week the sending of a post card addressed to HOROLOGICAL, Dept. A., Peoria, Ill., asking for one of our latest books telling all about Modern Methods as applied at this truly great institution.

SELF WINDING CLOCK CO.

NEW YORK

Self Winding Synchronized Clocks, Primary and Secondary Clock Systems, for Railroads, Public and Office Buildings, Hotels, Universities, Colleges, Schools and Private Residences.

Self Winding Program Instruments, Jewelers’ Regulators, Bank Clocks, Tower, Post and Bracket Clocks. Making Clocks to Architects’ designs a specialty.

Hourly signals of correction from the U. S. Observatory at Washington, D. C. over the lines of the Western Union Telegraph Co.

In 1854

Waltham Watches

awakened Europe to the fact that the American method of manufacturing produces the best watches. Since that time the burden of proof has been successfully carried by 17,000,000 WALTHAM WATCHES all representing the highest stage of the watchmakers’ art.

Howard Clocks

Are modern in the sense that they are the best timekeepers in the world although we have been making them since 1842, when our business was established by Edward Howard. We guarantee satisfaction and respectfully solicit your business.

The E. Howard Clock Co.

BOSTON, NEW YORK AND CHICAGO

Makers of Clocks but only of the highest grade in their respective lines

Jewelers’ regulators, electric clocks, house and office clocks, locomotive and engine room clocks, marine clocks, programme clocks, post or side walk clocks, tower clocks, watchman clocks, employees’ time recorders.

Ingersoll-Trenton $5

to

$15

The Best Seven Jewel Watch

GUARANTEED

The first watch guarantee ever issued was that placed on the cheapest watch ever made—the Dollar Watch—nineteen years ago.

For those nineteen years while selling nearly nineteen million Ingersoll watches, we have been asking: “Why are expensive, jeweled watches not guaranteed?”

The Ingersoll-Trenton is the first and only high grade 7-jewel watch made complete and cased in one factory; and therefore, the only one that can be guaranteed by its makers; others are assembled from movements made in one factory and cases from another, by the dealer, often a competent jeweler, but often, too, without facilities such as the adjusting and timing systems existing in our complete watch factory.

The “I-T” has all features of the most recent, costly watches, which secure accuracy. “I-T” gold-filled cases contain gold enough to outlive their guarantees. Sold only through responsible jewelers, who buy direct. If not on sale in your town we will send, prepaid express, on receipt of price.

INGERSOLL WATCHES

For seventeen years there has been but one standard in everyday watches; “Ingersolls” have popularized the very use of watches. One friend says, “They have made the dollar famous.” They have never been so worthy of their great reputation as to-day. Fully guaranteed. They include; The Dollar Watch; the “Eclipse” at $1.50; the new thin model “Junior” at $2.00; and the “Midget” ladies’ size at $2.00. Sold by 60,000 dealers or post-paid by us.

ROBERT H. INGERSOLL & BRO.

New York Chicago London San Francisco

THE GREAT AMERICAN CATALOGUE

Have you added this Salesman to your selling force?

Purchasing Goods from the Great American Catalogue insures prestige and the confidence your customers will bestow upon you will be apparent in increased patronage.

Our Catalogue meets with cordial approbation of old stand-by customers who are in a position to judge of the meritorious results obtained through constant use, as the best purchasing medium.

Please permit us to send you a copy.

The Oskamp-Nolting Co.

No. 411-413-415-417 ELM ST. Cincinnati :: :: :: Ohio.

MOSELEY

Made Continuously Imitated—but

for over 30 years NEVER EQUALED

The Standard of Excellence

Nothing is overlooked in their manufacture and no expense is spared to make them RIGHT. The Genuine Moseley Lathe of to-day is the result of years of painstaking, systematic and skilled endeavor to satisfy the exacting requirements of the most critical and experienced workmen.

Moseley Chucks are of the best quality, and are made in all sizes; covering every need of the Watchmaker and Repairer. These Chucks and Lathes were manufactured by us for years under the direct supervision of CHAS. S. MOSELEY, the inventor of the “Split Chuck” and “Draw-n-Spindle.”

Moseley Lathes and Attachments, with plenty of Moseley Chucks are the secret of rapid and accurate work. They increase your earning power by enabling you to do more work in a day. As an investment they pay big dividends.

Write your JOBBER for the NEW MOSELEY CATALOG—INSTRUCTION—REFERENCE BOOK No. 11 “YOU NEED IT EVERY DAY.”

“THERE’S NO LATHE LIKE THE MOSELEY”

Clock Tools and Clock Materials form an important and extensive item of stock in our Tool and Material Department, at

PRICES THAT DEFY COMPETITION

No. 2979. Clock Main Spring Winder. Nickel plated, $0.50

In Clock Springs, we keep the best polished only; our stock consisting of all the most desirable widths on the market.

If you do not possess our large Tool and Material Catalogue, kindly send us your business card and procure one.

We can save you time, money and annoyance; we are anxious to make your acquaintance, as we treat our customers with the utmost courtesy and attention.

A trial order solicited.

Otto Young & Co.

Wholesale Jewelers and Importers and Jobbers Diamonds, Watches, Clocks, Jewelry, Tools, Materials and Optical Goods.

Heyworth Building, Chicago