All 3 Uses

manifold
in
Moby Dick
(Auto-generated)

But these manifold mistakes in depicting the whale are not so very surprising after all.†
Chpt 55-57 *
For, when the line is darting out, to be seated then in the boat, is like being seated in the midst of the manifold whizzings of a steam-engine in full play, when every flying beam, and shaft, and wheel, is grazing you.†
Chpt 58-60
The one grand stage where he enacted all his various parts so manifold, was his vice-bench; a long rude ponderous table furnished with several vices, of different sizes, and both of iron and of wood.†
Chpt 106-108

Definitions:

(1) (manifold as in: reasons are manifold)
many and varied
(2) (meaning too rare to warrant focus)
Manifold can also be used as a noun to refer to a pipe that has several lateral outlets to or from other pipes; such as "the intake manifold of an engine." It can also refer to a concept in differential geometry.