It is more difficult to produce fire by the plough method than with the
bow, but it can be done. The appliances are simple enough. All you need
is a fireboard in which a groove or gutter has been cut, and a
rubbing-stick to push up and down the gutter (Fig. 80).
Other woods than spruce are used with success for fire-drills and
fireboards, but all must be dry. These are soft maple, cedar, balsam,
tamarack, cottonwood root, and _white_, not pitch, pine.