JOURNAL OF SCIENCE.

CONDUCTED BY

SIR W. FAIRBAIRN, Bart., F.R.S.; WILLIAM CROOKES, F.R.S.;

ROBERT HUNT, F.R.S.; H. WOODWARD, F.G.S., F.Z.S.;

AND

JAMES SAMUELSON,
OF THE MIDDLE TEMPLE, BARRISTER-AT-LAW,

EDITOR.

VOLUME VII.

With Illustrations on Copper, Stone, and mood.

LONDON:
LONGMANS, GREEN, AND CO., PATERNOSTER ROW.
Paris:

Leipzig:
FRIEDRICH KLINCKSIECK,

ALFONS DÜRR.

MDCCOLXX.

LONDON: PRINTED BY W. CLOWES AND SONS, STAMFORD STREET AND CHARING OROSS.