IV. "WHO GOES THERE?"

V. BETWEEN TWO PERILS

VI. ON THE WINGS OF THE WIND

VII. DROPPED FROM THE SKY

VIII. PHINEAS ROEBACH, OIL HUNTER

IX. THE EARTHQUAKE

X. THE BLACK DAY

XI. THE WONDERFUL LEAP

XII. THE GEYSER

XIII. NATURE GONE MAD

XIV. ON THE WING AGAIN

XV. A PLUNGE TO THE ICE

XVI. PROFESSOR HENDERSON REVEALS THE TRUTH

XVII. ON AN ISLAND IN THE AIR

XVIII. IMPRISONED IN THE ICE