Map of Scioto River Valley, Ohio.

<p>Location of 1) Morrison Village site, 2) Blain Village Site, and 3) location of clay used for experimental sample production.</p

Deflection curve comparisons.

<p>Charts showing relationships between tempers: grit, limestone, and burnt shell.</p

Instron 4-point bend test.

<p>Apparatus showing shell tempered samples (thin on left, thick on right).</p

Statistical results of nonparametric Mann-Whitney <i>U</i> tests.

<p>Statistical results of nonparametric Mann-Whitney <i>U</i> tests.</p