Chapter

 1 IV    |         explorer must penetrate fifteen hundred miles into the interior
 2 VII   |      was of a circular form and fifteen feet in diameter, was made
 3 VII   |     height and the shorter only fifteen feet.~These sheet-iron chests
 4 XII   |  perpendicularly to a height of fifteen hundred feet, as indicated
 5 XIV   | barometer indicated a height of fifteen hundred feet above the level
 6 XVII  |      was at twenty-nine degrees fifteen minutes east longitude,
 7 XVII  |    longitude, and three degrees fifteen minutes south latitude.
 8 XIX   |      23d of April, they had, in fifteen hours, impelled by a rapid
 9 XIX   |     more than three hundred and fifteen miles.~But this latter part
10 XXII  |         was twenty-four degrees fifteen minutes east longitude,
11 XXIV  |     scarcely gone a distance of fifteen miles, having expended,
12 XXV   |    balloon rapidly aloft.~About fifteen hundred feet from the ground,
13 XXVIII|       wrote down on his tablets fifteen degrees forty-three minutes
14 XIX   |     above the mass, with leaves fifteen feet in length upon its
15 XIX   |      sixty miles to each, about fifteen hundred miles in all.”~“
16 XXXI  |  covered with reeds and papyrus fifteen feet high, become the lake
17 XXXVI |      feet of the ground, and in fifteen we shall be right over him!”~“
18 XL    |         of foliage and verdure. Fifteen minutes later, the mass
19 XLIII |     aeronauts had made scarcely fifteen miles to the westward.~The
20 XLIII |     thought Joe~In the lapse of fifteen minutes the Victoria was