Book,  Chapter

 1        I,  V    | mountaineer when he has reached an altitude where the air has become
 2        I,  V    |      carried him in his turn to an altitude of thirty feet; in his ascent
 3        I,  VI   |          difficulty of the altered altitude of the sun and the absence
 4        I,  VII  |        reduced by one-third of its altitude. The identical phenomenon
 5        I,  X    |      latitude and longitude by the altitude of the sun, as his reckonings
 6        I,  X    |          Boujereah, had reached an altitude of 1,200 feet; but even
 7        I,  XI   |         which was known to have an altitude of more than 7,000 feet.~
 8        I,  XVI  |         Before they had reached an altitude of 600 feet they noticed
 9        I,  XVIII|            hovering over it, at an altitude of little more than a hundred
10       II,  IV   |           I was unable to take the altitude of sun or star.”~“At what
11       II,  XI   |          raised to a still greater altitude.~So irresistible was this
12       II,  XVIII|             and quickly sunk to an altitude in the comet’s atmosphere