Evolution.
By PROF.

J.ARTHUR THOMSON and PROF.

PATRICK GEDDES.

Explains to the layman what the title means to the scientific world.
23.

Astronomy.
By A.R.HINKS, Chief Assistant at the Cambridge Observatory.
"Decidedly original in substance, and the most readable and informative little book on modern astronomy we have seen for a long time."-- _Nature_.
24.