AT WORK IN A PNEUMATIC CAISSON--FIFTY FEET BELOW THE SURFACE OF THE WATER Walter Shirlaw 73 BELOW THE BROOKLYN BRIDGE J. H. Twachtman 83 THE ST. LOUIS BRIDGE DURING CONSTRUCTION M. E. Sands & R. Blum 95 A TYPICAL AMERICAN PASSENGER LOCOMOTIVE _From a photograph_ 111 INTERIOR OF A ROUND-HOUSE M. J. Burns 130 VIEW IN LOCOMOTIVE ERECTING SHOP J. D. Woodward & R. Blum 135 DIAGRAM USED IN MAKING RAILWAY TIME-TABLES 161 THE GENERAL DESPATCHER M. J. Burns 165 MANTUA JUNCTION, WEST PHILADELPHIA, SHOWING A COMPLEX SYSTEM OF INTERLACING TRACKS W. C. Fitler 169 DANGER AHEAD! A. B. Frost 189 INTERLOCKING APPARATUS FOR OPERATING SWITCHES AND SIGNALS BY COMPRESSED AIR, PITTSBURG YARDS, PENNSYLVANIA RAILROAD _From a photograph_ 211 PULLMAN VESTIBULED CARS _From a photograph_ 247 IN A BAGGAGE-ROOM W. C. Broughton 255 "SHOW YOUR TICKETS!" Walter Shirlaw 261 FREIGHT YARDS OF THE NEW YORK CENTRAL & HUDSON RIVER RAILROAD, WEST SIXTY-FIFTH STREET, NEW YORK W. C. Fitler 285 FREIGHT FROM ALL QUARTERS--SOME TYPICAL TRAINS W. C. Fitler 291 AT A WAY-STATION--THE POSTMASTER'S ASSISTANT Herbert Denman 321 TRANSFER OF MAIL AT THE GRAND CENTRAL STATION, NEW YORK Herbert Denman 327 SORTING LETTERS IN CAR NO. 1--THE FAST MAIL Herbert Denman 333 A BREAKDOWN ON THE ROAD A. B. Frost 405 IN THE WAITING ROOM OF A COUNTRY STATION A. B. Frost 413 THE TRIALS OF A BAGGAGE-MASTER A. B. Frost 417 ILLUSTRATIONS IN THE TEXT. PAGE First Locomotive 2 Locomotive of To-day 3 A Sharp Curve--Manhattan Elevated Railway, 110th Street, New York 7 A Steep Grade on a Mountain Railroad 8 A Switchback 9 Plan of Big Loop 10 Profile of the Same 10 Engineers in Camp 14 Royal Gorge Hanging Bridge, Denver and Rio Grande, Colorado 16