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duce an Introductory and an Advanced Text - Book of Physical Geography, in accordance with the requirements of modern education, and the advancing state of the natural sciences. As the Introductory is not a mere narration of dry facts, to be irksomely committed to memory, but an outline of phenomena and principles to be read and reasoned ; so the Advanced, avoiding the argumentative character of a scientific essay, aims at something more than a bulky compilation of disjointed descriptions, and not unfrequently contradictory statements. In both instances a systematic treatment has been strictly adhered to; and while the Introductory may meet the requirements of junior students, and those who cannot command time for an extended course, the Advanced, it is hoped, will satisfy the wants of senior students, as well as of those who merely seek a general acquaintance with the natural phenomena of our planet. The explanation of principles, rather than a detail of facts, has been a main object throughout, that the student may be enabled to apply them to his own observations and readings—readings that become every year more extensive, from the increasing facilities for travel in remote and imperfectly known regions.
To assist the student in the comprehension of his subject, an extensive Glossary of Terms has been appended, and a number of illustrations inserted in the text; but the accompaniment of maps has been rendered unnecessary by the recent publication of several excellent Atlases of Physical Phenomena, and, above all, by those constructed by Mr Keith Johnston, and issued at very moderate prices by the publishers of the present treatise.
GILMORE PLACE, EDINBURGH,
Connection between Geology and Physical Geography, 43