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Of the Motion of the Blood.

Some by their Industry and Learning found,
That all the Blood like to the Sea runs round;
From two great Arteries it doth begin,
Runs through all Veins, and so comes back again.
The Muscles like the Tides do ebb and flow,
According as the several Spirits go;
The Sinews as small Pipes come from the Head,
And they are all about the Body spread,
Through which the Animal Spirits are convey'd
To every Member, as the Pipes are laid;
And from those Sinews pipes each Sense doth take
Of those pure Spirits, as they us do make.