Chapter

 1 IX  |    had taken into account the altitude necessary to clear the summits
 2 IX  |  which rose high owing to the altitude of the “Albatross.”~During
 3 X   |       The aeronef was at this altitude owing to the elevation of
 4 XI  |      to rise above it. At the altitude she was there was no obstacle
 5 XII |    The barometer indicated an altitude of thirteen thousand feet
 6 XII | twenty-three thousand feet in altitude.~Magnificent was the grouping
 7 XIII|      map are of very moderate altitude. But as the ship approached
 8 XV  |      to her keeping at a good altitude amid a bank of light cloud.~
 9 XX  |    that by sunrise at such an altitude he would still be in sight
10 XXI |      the northeast at a great altitude. Her electric lamps rendered
11 XXII|  atmosphere—and stopped at an altitude of eight hundred feet.~Then