(2) Where it is desired to have the hinged portion open flat and no more.

Here the center of the pin is in line with the outside surface of the wood.
This is less likely to rack the hinge than the other two positions.
(3) Where it is desired to have the knuckle project as little as possible.
[Illustration: Fig.234.Parts of a butt-hinge.

1.1.Leaves.

2.2.2.
Knuckle.3.Pintle.4.

Acorn.] HINGING In setting the hinges of a box cover, first see that the cover fits the box exactly all the way around.
In the case of a door, see that it fits its frame, evenly all the way around, but with a little play.