A therapeutic mattress system is provided for treating a patient. Gasses generated within the electrolysis operation, primarily hydrogen that is liberated at the cathode surface, increase the pressure within the cell, and the gas pressure is ultimately utilized to expel the oxidant from the cell chamber. Means are provided for conveying soil probes from relative positions at which they are disposed to a distributor generally at the centerline of the vehicle. This process continues until the portrait-oriented graphic is entirely loaded. Further, at the peripheral portion of the end of the pipe, a rear-leading end of the inner tube is clamped by a clamp.