| Data Collected |
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| Tip of
“left hand” |
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| alternate-face,
beveled |
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| knife
facing toward |
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| viewer |
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| • | Blade
Torsion (BT) |
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| • | BT = rank
of blade |
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| margin position |
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| relative to the
parallel |
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| axis of blade
margins |
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| and base, or |
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| centerline, in
unused |
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| condition (BU). |
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| BT |
| BU |
| SA |
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| Cross section of |
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| archaic
bevel knife form |
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