12. (c) TWO SPECIMENS OF FULGURITES FROM THE SOUTHERN SANDS.

Actual size.
(See page 199)

12. (b) INTERIOR OF (a) CUT THROUGH TO SHOW THE COMPOSITION OF THE

SILICA GLASS FORMED BY THE FUSING OF THE SAND BY THE GREAT HEAT OF

THE METEORITE.

(See page 177) To face page 156.