AUTHORESS OF “MECHANISM OF THE HEAVENS,' AND

PHYSICAL GEOGRAPHY.'

“No natural phenomenon can be adequately studied in itself alone-
but, to be understood, it must be considered as it stands connected with
all 2."-BACON.

Ninth Edition, completely Revised.

LONDON:

JOHN MURRAY, ALBEMARLE STREET.

1858.

The right of Translation is reserved.

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

XD CIIARING CROSS.