This saw trims the ends of timbers.] A large part of the problem of sawmilling is the disposal of the waste.

The first of these is the sawdust.

In all first class mills, this together with shavings (if a planing-mill is combined) is burned for fuel.

It is sucked up from the machines and carried in large tubes to the boiler-room and there is mechanically supplied to the fires.
The slabs, once considered as waste, contain much material that is now utilized.

From the live rolls, on which all the material falls from the main band-saw, the slabs are carried off by transfer chains, and by another set of five rollers to the "slasher," Fig.