J.N. Callahan Live Saving Device Size:16" x 20" The inner set of spiral

The inner set of spiral arms is highly warped out of the plane with one of the arms going behind the bulge and coming back out the other side

another day warm so-o-o the photographer brought home a 'hot cool' picture - left to right: Margaret Scott

Photograph by Jack Boucher in 4x5 inch negative

How these two spiral patterns connect is still not precisely known

George Zamka

J.N. Callahan Live Saving Device Size:16" x 20" The inner set of spiralJ. N. Callahan in his Live Saving Device photographed by the Bain News Service May 24 1913 on 5x7 glass plate negative. Photo shows J. N. Callahan with a lifesaving device "Coxey's Life Saver and Water Wings."