TABLE OF CONTENTS

Page
CHAPTER I.The Despatch [9]
CHAPTER II.Two Friends [18]
CHAPTER III.Monsieur Roger [26]
CHAPTER IV.Monsieur Roger's Story [32]
CHAPTER V.Fire at Sea [39]
CHAPTER VI.Miss Miette's Fortune [46]
CHAPTER VII.Vacation [53]
CHAPTER VIII.A Drawing Lesson [59]
CHAPTER IX.The Tower of Heurtebize [66]
CHAPTER X.Physical Science [75]
CHAPTER XI.The Smoke Which Falls [84]
CHAPTER XII.At the Centre of the Earth [92]
CHAPTER XIII.Why Lead is Heavier than Cork [99]
CHAPTER XIV.The Air-Pump [104]
CHAPTER XV.Drops of Rain and Hammer of Water [114]
CHAPTER XVI.Amusing Physics [119]
CHAPTER XVII.Why the Moon does not Fall [127]
CHAPTER XVIII.A Mysterious Resemblance [138]
CHAPTER XIX.The Fixed Idea [146]
CHAPTER XX.Fire [152]
CHAPTER XXI.Saved [161]
CHAPTER XXII.George! George! [167]
CHAPTER XXIII.A Proof? [178]
CHAPTER XXIV.The Air and the Lungs [184]
CHAPTER XXV.Oxygen [190]
CHAPTER XXVI.Why Water Puts out Fire [200]
CHAPTER XXVII.Paul or George? [214]
CHAPTER XXVIII.My Father [222]