Band-Saw.] The band-saw is fast displacing the other two, wherever it can be used.

It cuts with great rapidity and the kerf is narrow.

When first used it could not be depended upon to cut straight, but by utilizing the same principle that is used in the circular-saw, of putting the cutting edge under great tension by making it slightly shorter than the middle of the saw, it now cuts with great accuracy.

Band-saws are now made up to 12 inches wide, 50 feet long, and run at the rate of 10,000 feet a minute.

They are even made with the cutting teeth on both edges, so that the log can be sawed both going and coming.