Fig. 1763.
[Fig. 1763] represents the spoon bit whose groove extends close to the point, as shown by the dotted line c.
Fig. 1764.
[Fig. 1764] represents the pod or nose bit, whose cutting edge extends half way across its end and therefore cuts off successive layers of the fibres, which peculiarly adapts it for boring endways of the grain, making a straight and smooth hole. It is made in sizes up to as large as four inches, and is largely used for the bores of wooden pipes and pumps, producing holes of great length, sometimes passing entirely through the length of the log.
Fig. 1765.