THE PROGRESSIVE SCIENCE SERIES 



EARTH SCULPTURE 



or, the Origin of Land-forms 



By JAMES GEIKIE, LL.D., D.C.L., F.R.S., Etc. 



Murchiaon Professor of Geology and Mineralogy in the 



University of Edinburgh 



Second Edition. With numerous Illustrations. 6s. net 



A general account of geology which will be welcomed by all interested in 

 the making of the world and desirous of acquiring some broad knowledge of 

 the results arrived at by geologists as to the development of land-forms. 



CONTENTS 



Introductory— Agents of Denudation — Land-forms in Regions of Horizontal 

 Strata— Land-forms in Regions of Gently-inclined Strata— Land-forms in 

 Regions of Highly-folded and Disturbed Strata— Land-forms in Regions 

 affected by Normal Faults or Vertical Displacements— Land-forms due 

 Directly or Indirectly to Igneous Action — Influence of Rock-character in the 

 Determination of Land-forms — Land-forms modified by Glacial Action— 

 Land-forms modified by /Eolian Action — Land-forms modified by the 

 Action of Underground Water — Basins — Coast-lines— Classification of Land- 

 forms — Conclusion — Appendix — Glossary — Index. 



VOLCANOES 



Their Structure and Significance 



By T. G. BONNEY, D.Sc, F.R.S. 

 Emeritus Professor of Geology at University College, London 



Second Edition. With numerous Illustrations. 65. net 



" I have endeavoured to lead the reader through descriptions of the varied 

 phenomena of volcanic action in the present and in the past towards ascertain- 

 ing by inference the cause, or causes, of eruptions. For this reason I begin 

 by an account of the " living volcano," choosing instances which may exhibit 

 it (to continue the metaphor) at every stage from birth to death. Next I 

 conduct the reader to the dissecting theatre, and point out what may be dis- 

 covered in this method of study. I then recount the geological history of 

 volcanoes in a single country, with a view of bringing out the changes in the 

 position of vents, and in the nature of ejected materials, and, lastly, I describe 

 the distribution of volcanoes either at present or in comparatively recent times, 

 in the hope of finding something suggested by their geographical position and 

 modes of occurrence. In the last chapter I sum up the results to which our 

 investigations have apparently pointed, and endeavour to ascertain the con- 

 clusions to which they lead." — Extract from Professor Botwey's Preface. 



CONTENTS 



Volcanoes — Life-History- -Products — Dissection — Geological History — Dis- 

 tribution — Theories — Appendix — Glossary — Index. 



