Bessemer's costly experiment, p. [217]—Dr. Schlick's successful experiment, p. [219]—The action of Dr. Schlick's invention explained, p. [220]—Did gyroscopic action wreck the Viper? p. [222]—Theoretical dangers of the gyroscope, p. [223]—Probable use of the gyroscope on battleships, p. [225].

[CHAPTER IX]

NAVIGATING THE AIR

Some mediæval traditions about airships, p. [266]—The flying machines devised by Leonardo da Vinci, p. [277]—The flying machine of Besnier, p. [228]—The discovery of hydrogen gas and its effect upon aeronautics, p. [230]—The balloon invented, p. [231]—The first successful balloon ascension, p. [232]—Rozier, the first man to make an ascent in a balloon, p. [235]—Blanchard's attempt to produce a dirigible balloon, p. [238]—Hot-air balloons and hydrogen-gas balloons, p. [240]—Rozier, the first victim of ballooning, p. [241]—Progress in mechanical flight, p. [244]—Cocking's parachute, p. [245]—Henson's studies of the lifting power of plane surfaces, p. [246]—The flying machine of Captain Le Bris, p. [248]—Giffard "the Fulton of aerial navigation," p. [251]—The flights of the Giant, p. [252]—The record flight of John Wise in 1859, p. [256]—Early war balloons and dirigible balloons, p. [257]—The use of balloons during the Franco-Prussian war, p. [258]—The dirigible balloon achieved, p. [262]—The dirigible balloon of Dupuy de Lome, p. [263]—The aluminum balloon of Herr Schwartz, p. [264]—The dirigible balloons of Count Zeppelin, p. [266]—Early experiments of Santos-Dumont, p. [267].

[CHAPTER X]

THE TRIUMPH OF THE AEROPLANE

Balloon versus aeroplane, p. [272]—The kite as a flying machine, p. [273]—How the air sustains a heavier-than-air mechanism, p. [274]—Langley's early experiments, p. [275]—Experiments in soaring, p. [277]—Lilienthal's imitation of the soaring bird, p. [279]—Sir Hiram Maxim's flying machine, p. [283]—Langley's successful aerodrome, p. [284]—The failure of Langley's larger aerodrome, p. [287]—Wilbur and Orville Wright accomplish the impossible, p. [288]—The first public demonstration by the Wright brothers, p. [290]—The Wright aeroplane described, p. [291]—A host of imitators, p. [292]—Mr. Henry Farman's successful flights, p. [293]—Public demonstrations by the Wright brothers in America and France, p. [293]—The English Channel crossed by Blériot, p. [294]—Orville Wright fulfils the Government tests, p. [295]—Spectacular cross-country flights, p. [296]—The Wright brothers the true pioneers, p. [300].

[ILLUSTRATIONS]

THE WRIGHT AEROPLANE IN FRANCE IN 1908[Frontispiece]
Facing page
"TAKING THE SUN" WITH THE SEXTANT[22]
THE OLD AND THE NEW—A CONTRAST[60]
MARINE ENGINES AND AN EARLY TYPE OF STEAMBOAT[64]
THE STEAMSHIPS "CHARLOTTE DUNDAS" AND "CLERMONT"[68]
THE "CLERMONT"[72]
ROBERT FULTON[98]
THE AMERICAN SUBMARINE BOAT "CUTTLEFISH" IN DRY DOCK AT THE BROOKLYN NAVY YARD[108]
A FLEET OF BRITISH SUBMARINES MANŒUVERING AT THE SURFACE[116]
GEORGE STEPHENSON[124]
A CENTURY'S PROGRESS IN LOCOMOTIVE BUILDING[128]
CUGNOT'S TRACTION ENGINE AND THE "NOVELTY" LOCOMOTIVE[132]
THE FAMOUS LOCOMOTIVES "ROCKET" AND "SANS-PAREIL"[134]
THE DEVELOPMENT OF THE LOCOMOTIVE[150]
THE HOBBY-HORSE OF 1820 CONTRASTED WITH THE MOTOR CYCLE OF TO-DAY[154]
THE EVOLUTION OF THE BICYCLE[156]
THE EXTREMES OF AUTOMOBILE DEVELOPMENT[158]
AN ENGLISH STEAM COACH OF 1827 AND A NEW YORK TAXICAB OF 1909[162]
A RACING AUTOMOBILE[166]
RETROSPECT AND PROSPECT IN TRANSPORTATION—THE DE WITT CLINTON TRAIN AND THE GYROCAR[200]
TWO VIEWS OF MR. LOUIS BRENNAN'S MONORAIL GYROCAR[216]
AN INTERNATIONAL BALLOON RACE[242]
TWO FAMOUS FRENCH WAR BALLOONS[264]
THE ZEPPELIN DIRIGIBLE BALLOON[266]
AN ENGLISH DIRIGIBLE BALLOON[268]
ENGLISH AND AMERICAN DIRIGIBLE WAR BALLOONS AND A WRIGHT AEROPLANE[270]
THE AEROPLANE OF M. SANTOS-DUMONT[272]
LEARNING HOW TO FLY[278]
FLYING MACHINES OF THE MONOPLANE TYPE[284]
THE WRIGHT AEROPLANE[288]
MR. WILBUR WRIGHT PREPARING TO ASCEND IN HIS AEROPLANE WITH HIS PUPIL M. CASSANDIER[292]
THE FARMAN AEROPLANE[294]
THE MONOPLANES OF BLÉRIOT AND LATHAM[296]
A BRITISH AEROPLANE[298]
MR. WILBUR WRIGHT FLYING OVER NEW YORK HARBOR, OCTOBER 4, 1909[300]