USGS - science for a changing world

Second Layer of Lead Bricks for Gamma-Ray Castle

(as viewed from above with front of castle at bottom)

Second Layer

Outer bricks are positioned vertically along outer edge of layer 1, forming a cavity for layer 3.  Requires four 6" long and two 4" long bricks in addition to 40 standard-sized bricks.

For more information about this report contact: Stephen L. Snyder or Joseph S. Duval
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