This idea was unsuccessful until the invention of the telescopic band-mill, Fig.35.In this the entire mechanism carrying the wheels on which the band-saw revolves can be moved up and down, so as to bring the point where the saw leaves the upper wheel as close to the top of the different sized logs as possible.
[Illustration: Fig.35.

Double-Carrying Telescopic Band-Mill.

Mill in raised position for large log.] [Illustration: Fig.36.

Jack-Ladder, with Endless Chain.] The usual modern mill is a two story building, Fig.

37, built at a convenient locality both for receiving the logs and for shipping the lumber.