_Encyclopoedia_Britannica_, the _Times_, the _Morning_Post_, the
_National_Review_, the _Nineteenth_Century_and_After_, the
_Cornhill_Magazine_, and the _Naval_Annual_. The proprietors of
those publications have courteously given me permission to
republish them here.

Special mention must be made of my obligation to the proprietors
of the _Encyclopoedia_Britannica_ for allowing me to reproduce
the essays on 'Sea-Power' and 'The Command of the Sea.' They are
the owners of the copyright of both essays, and their courtesy
to me is the more marked because they are about to republish them
themselves in the forthcoming edition of the _Encyclopoedia_.

The paper on 'Naval Strategy and Tactics at the Time of Trafalgar'
was read at the Institute of Naval Architects, and that on 'The
Supply and Communications of a Fleet' at the Hong-Kong United
Service Institution.




I

SEA-POWER[1]

[Footnote 1: Written in 1899. (_Encyclopoedia_Britannica_.)]

Sea-power is a term used to indicate two distinct, though cognate
things. The affinity of these two and the indiscriminate manner
in which the term has been applied to each have tended to obscure