So when a number of like pieces are to be gaged, all the parts requiring the same setting should be gaged before the gage is reset for another gaging.

This is a great saving of time and insures accuracy.
In making a number of like parts, if they are not too large much of the work can often be done in one piece before it is cut up.

For example, to make a number of slats from a given piece of wood, the piece may first be brought to such dimensions that the length will be correct for the finished pieces and the thickness of the piece be equal to the width of the slats, Fig.303.The face may then be gaged with a series of lines so that every other space will be equal to the required thickness of each slat, and the alternate spaces be just sufficient for the saw kerf and dressing.

The slats may then be ripped apart and dressed to size.
[Illustration: Fig.303.Making a Number of Like Pieces from a Given Piece.] Or a long strip may be planed to thickness and width and then be sawn up and finished to the proper lengths.

For example, in a mitered picture-frame it may be convenient to plane up two pieces, each one long enough to make one long side and one short side.
In fitting up framed structures each part when fitted should be distinctly marked, so that there may be no confusion in assembling.
4.