Then steel legs, which are curved outwardly, are lowered until the shoes which are attached to them rest on the outward end of the railroad ties.

The truck of the locomotive is then folded up under it out of the way and cars can run under it, the curved legs giving plenty of clearance.
The derrick attached is of the breast type, the two legs being firmly fastened.

When anchored the engine can be used either for skidding or loading.

For skidding, there are two cables, one being run out while the other is being wound on its drum.
[Illustration: Fig.28.Log Train, Humboldt County, California.] In loading, the machine is located so that the empty car will be directly in front of it, and then the logs are lifted up and placed on the car by the derrick.

When the car is loaded the machine can either move on to the next car, or pull it under itself into place.