CONTENTS 
PAGE 
Preface, ix 
Introduction, xiii 
CHAPTER I. 
On the various Methods of Obtaining, Examining, and Describing Deep-Sea Deposits, . 1-32 
CHAPTER II. 
On the Nature and Composition of the Specimens of Deep-Sea Deposits collected during 
the Challenger Expedition, and their Variations with Change of Conditions, . . . 33-183 
CHAPTER IIL 
On Recent Marine Formations and the different Types of Deep-Sea Deposits ; their Com- 
position, Geographical and Bathymetrical Distribution, ..... 184-248 
CHAPTER IV. 
Materials of Organic Origin in Deep-Sea Deposits, ..... 249-288 
CHAPTER V. 
Mineral Substances of Terrestrial and Extra-terrestrial Origin in Deep-Sea Deposits, . 289-334 
CHAPTER VI. 
Chemical Products formed in situ on the Floor of the Ocean, .... 335-412 
APPENDICES. 
Appendix 
I. Explanation of Charts and Diagrams, ....... 413-415 
II. Report on an Analytical Examination of Manganese Nodules, by John Gibson, Ph.D., 
F.R.S.E., with Diagram, ........ 417-423 
III. Chemical Analyses, ......... 425-496 
