Sentence:  [T]he Sea and the Land make one Globe, and the waters <WSD>couch</WSD> themſelves, as cloſe as may be, to the Center of this Globe in a Spherical convexity; ſo that if all the Mountains and Hills were ſcal'd, and the Earth made even, the Waters would not overflow its ſmooth ſurface; ... 
Meaning of the word marked with <WSD> tags:  To arrange or dispose as if in a bed.