THE QUARTERLY

JOURNAL OF SCIENCE.

EDITED BY

JAMES SAMUELSON

WILLIAM CROOKES, F.R.S.

AND

VOLUME IV.

With Illustrations on Copper, Wood, and Stone.

Sm

LONDON:

JOHN CHURCHILL AND SONS, NEW BURLINGTON STREET.

Paris:

VICTOR MASSON ET FILS.

14

MDCCCLXVII.

Leipzig:

ALFONS DÜRR.