Editor
AUTHOR Opposite page 52 List of Illustrations CHICAGO-Colored Frontispiece BIRMINGHAM, ALABAMA BETELGEUSE AND THE SOLAR SYSTEM BETELGEUSE IN ORION SIMON BOLIVAR BOMBAY, INDIA COLLECTION OF BOMBS BOMB EXPLOSION BOSTON, MASSACHUSETTS Opposite page 164 TOWER BRIDGE, LONDON BROOKLYN BRIDGE, NEW YORK HELL GATE BRIDGE, NEW YORK SUSPENSION BRIDGE, NIAGARA FIRTH OF FORTH BRIDGE QUEBEC BRIDGE, ST. LAWRENCE RIVER DUHAMEL TRESTLE BRIDGE OHIO RIVER BRIDGE AT HENDERSON ORE BRIDGES AT BETHLEHEM, PENN- SYLVANIA NILE BRIDGE NEAR CAIRO HOOGHLY RIVER BRIDGE, CALCUTTA Opposite page 260 BUENOS AIRES, ARGENTINA