Plane mark
Definition
A surface trace left by a hand or machine plane, showing the arc of the blade stroke and any irregularities such as nicks. In Koehler's analysis, a nicked blade on a specific planer in a South Carolina mill left a repeated ridge pattern on the ladder rails that could be matched back to the machine.
Related terms
- Crossgrain
- A condition in which the wood fibres run at an angle to the long axis of the piece. In Rail 16, Koehler...
- Grain matching
- The physical comparison of growth-ring pattern and fibre direction at a fracture or cut surface to an adjacent piece of wood. Because...
- Rail 16
- Koehler's designation for the left side rail of the bottom section of the Lindbergh ladder. The rail that was matched by grain,...
- Supply chain tracing
- In Koehler's investigation, the process of tracking the ladder lumber from the sawmill of origin through the distribution network to the retail...
- Tool-mark analysis (wood)
- Examination of surface marks left by cutting, planing, or shaping tools to identify the tool type, size, and individual characteristics of the...
Explained in
- The Lindbergh Kidnapping: Ladder EvidenceA surface trace left by a hand or machine plane, showing the arc of the blade stroke and any irregularities such as nicks. In Koehler's analysis, a nicked blad...