水位から水位へと落下する潮流または水流の利用から得られる潜在力 第66投。549ページ、226行目。 its potentiality derivable from harnessed tides or watercourses falling from level to level: its submarine fauna and flora (anacoustic, photophobe), numerically, if not literally, the inhabitants of the globe: its ubiquity as constituting 90 % of th…