T

A

HISTORY

OF

INVENTIONS, DISCOVERIES,

AND ORIGINS.

ann

BY JOHN BECKMANN,

PROFESSOR OF ECONOMY IN THE UNIVERSITY OF GÖTTINGEN.

TRANSLATED FROM THE GERMAN,

BY WILLIAM JOHNSTON.

Fourth Edition,

CAREFULLY REVISED AND ENLARGED BY

WILLIAM FRANCIS, Ph.D., F.L.S.,

EDITOR OF THE CHEMICAL GAZETTE ;

AND

J. W. GRIFFITH, M.D., F.L.S.,

LICENTIATE OF THE ROYAL COLLEGE OF PHYSICIANS.