. The woodsman's handbook. Fig. 14.—Cruisers bark blazer. 110 THE woodsmans HANDBOOK THE PRESSLER INCREMENT BORER. For extracting a solid plug of wood from a standing tree in orderto count the rings in the 1 or 2 inches, with less injury to thetree than cutting a notch for this Fig. 15.—Pressler increment borer. The instrument consists of three essential pait^: ^ A hollow steel auger (A) 3 or 4 inches long, tapering and threadedon one end and a square shank at the other to fit in /K^^S^ESiiS^^^^^^the square eye of the hol-low handle (B). (C) is apin-shaped wedge withtoothed end
. The woodsman's handbook. Fig. 14.—Cruisers bark blazer. 110 THE woodsmans HANDBOOK THE PRESSLER INCREMENT BORER. For extracting a solid plug of wood from a standing tree in orderto count the rings in the 1 or 2 inches, with less injury to thetree than cutting a notch for this Fig. 15.—Pressler increment borer. The instrument consists of three essential pait^: ^ A hollow steel auger (A) 3 or 4 inches long, tapering and threadedon one end and a square shank at the other to fit in /K^^S^ESiiS^^^^^^the square eye of the hol-low handle (B). (C) is apin-shaped wedge withtoothed end. The augerand wedge are carried in the hollow handle (which is fitted withscrew caps) when not in use. In using the instrument it is bored into the tree toward thecenter. As the thread forces the auger in, the knife edge sur-rounding the oi)ening of the auger cuts a solid cylinder of wood f ) Fig. 10.—Core extracted, showing rings. I« INSTRUMENTS USEFUL TO A WOODSMAN. Ill which passes up inside the auger. When the proper depth has beenbored, the thin wedge (C) is driven into the hollow auger from theshank end and passes between the cylinder of wood and the sideof the auger, thus wedging it fast. Then the first twist of the auger,in withdrawing it, breaks off the cylinder of wood
Size: 1894px × 1319px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidwoodsmanshan, bookyear1912
