This stop is also worked by steam.

By letting the steam into the cylinder which controls it, one log is rolled over on the carriage and the next one held.

The log on the carriage is at once "dogged," that is, clamped tight by iron dogs, the carriage is set for the proper cut, and moves forward to the saw which cuts off the first slab.

The carriage is then "gigged" or reversed.

This operation offsets the carriage one-eighth of an inch so that the log returns entirely clear of the saw.