Mercury delay lines are literally tanks of liquid, which are prone to leaks, sometimes without warning. Dangerous anywhere, particularly ill-suited to a museum

Mercury delay lines are literally tanks of liquid, which are prone to leaks, sometimes without warning. Dangerous anywhere, particularly ill-suited to a museum kids may visit. As to architectural properties, the main thing that they want out of them is that they delay signals by the same number of microseconds; arranging that is not a problem.