THE

EDINBURGH NEW

PHILOSOPHICAL JOURNAL.

102 04.81

19-13

THE

EDINBURGH NEW

PHILOSOPHICAL JOURNAL,

EXHIBITING A VIEW OF THE

PROGRESSIVE DISCOVERIES AND IMPROVEMENTS

IN THE

SCIENCES AND THE ARTS.

EDITORS.

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, M.A., M.D.,

F.R.SS.L. & E., F.L.S.,

REGIUS KEEPER OF THE ROYAL BOTANIC GARDEN, AND PROFESSOR OF MEDICINE AND BOTANY,
UNIVERSITY OF EDINBURGH.

FOR AMERICA,

HENRY DARWIN ROGERS, Hon. F.R.S.E., F.G.S.,

STATE GEOLOGIST, PENNSYLVANIA; LATE PROFESSOR OF GEOLOGY AND MINERALOGY,
UNIVERSITY, PENNSYLVANIA.

JULY ...... OCTOBER 1856.

VOL. IV. NEW SERIES.

EDINBURGH:

ADAM AND CHARLES BLACK.

LONGMAN, BROWN, GREEN, & LONGMANS, LONDON.

MDCCCLVI.

EDINBURGH:

PRINTED BY NEILL AND COMPANY, OLD FISHMARKET.

CONTENTS.

PAGE

1. An Account of some Experiments on certain Sea-Weeds

of an Edible kind. By JOHN DAVY, M.D., F.R.SS.

Lond. & Ed., &c.,

2. Exposition of the Mechanical Inventions of Dr Robert

Hooke. By ALEXANDER BRYSON, F.S.A. Scot.,

3. On the Rare Lichens of Ben Lawers. By HUGH MAC-

MILLAN, F.B.S.E.,

4. Displacement and Extinction among the Primeval Races

of Man. By DANIEL WILSON, LL.D., Professor of

History and English Literature, University College,

Toronto,

5. An Experimental Inquiry, undertaken with the view of

ascertaining whether any signs of Current Electricity

are manifested in Plants during Vegetation. By H.

F. BAXTER, Esq.,

6. On the Occurrence of Scalariform Tissue in the Devonian

Strata of the South of Ireland.

NESS, F.R.SS. L. & E., F.G.S., Professor of Geology,

Queen's College, Cork. (Plate I.),

1

12

27

39

49

By ROBERT HARK-

64

7. Geology of the Southern Concan. By Lieut. A. AYTOUN,

Bombay Artillery. (Plate II.),

67