Homemade, oversized, “nuclear weapon effects computer”. Circular slide rules manufactured to calculate the various effects and time lengths of a post nuclear landscape.

1. The Commander’s Radiation Guide, ca. 1960’s. Also described as the “Fission Fragment Fallout Decay and Dose Guide."
2. Detail of the homemade slide rule showing just a few of it’s charming variables.

reed more here www.thenonist.com/index.php/thenonist/categories/C53/P20/