Electricity Frisks Mattress (Apr, 1938)
Electricity Frisks Mattress
IF PRISONERS in the Joliet and Stateville, Ill., penitentiaries should hide pistols, knives or saws in their mattresses, this machine will detect them. It is wheeled around the prison, and every mattress is subjected to its scrutiny once a day.
Exactly why I always make my shivs out of toothbrush handles.