THE

POPULAR SCIENCE

REVIEW.

VOL. XIII.

LONDON PRINTED BY

SPOTTISWOODE AND CO., NEW-STREET SQUARE

AND PARLIAMENT STREET

THE

POPULAR SCIENCE

REVIEW.

PUBLIC

A QUARTERLY MISCELLANY OF

ENTERTAINING AND INSTRUCTIVE ARTICLES ON

SCIENTIFIC SUBJECTS.

EDITED BY HENRY LAWSON, M.D.

VOLUME XIII.

LONDON:

ROBERT HARDWICKE, 192 PICCADILLY;

AND ALL BOOKSELLERS.

1874.