PROGRESSIVE DISCOVERIES AND IMPROVEMENTS
THOMAS ANDERSON, M.D., F.R.S.E.,
REGIUS PROFESSOR OF CHEMISTRY, UNIVERSITY OF GLASGOW;
SIR WILLIAM JARDINE, BART., F.R.S.E.;
JOHN HUTTON BALFOUR, A.M., M.D.,
F.R.S., SEC. R.S. EDIN., F.L.S.,
REGIUS KEEPER OF THE ROYAL BOTANIC GARDEN, AND PROFESSOR OF MEDICINE AND BOTANY,
UNIVERSITY OF EDINBURGH.
HENRY D. ROGERS, LL.D., Hon. F.R.S.E., F.G.S.,
STATE GEOLOGIST, PENNSYLVANIA; PROFESSOR OF NATURAL HISTORY IN THE
UNIVERSITY OF GLASGOW.
EDINBURGH:
ADAM AND CHARLES BLACK.
LONGMAN, BROWN, GREEN, & LONGMANS, LONDON.
MDCCCLXII.