Paragraph 101. While cloth is always woven so that the threads run perpendicular to each other, that is, the woof threads( those that run from selvage to selvage) cross the warp threads (those that run lengthwise of the goods) at right angles, yet it is often stretched out of shape after it is woven. It may be straightened by pulling it diagonally at opposite corners, and then pulling it straight on the warp threads.