Abstract: A medical electrical apparatus impresses a bipolar, low frequency voltage wave form through spaced-apart electrodes, across a damaged area of living animal tissue to cause a low, bipolar, current to flow through the damaged area to increase the metabolic activity of viable cells in that area and hence to accelerate healing. The current flow is monitored and used to control the magnitude of the voltage wave to cause the magnitude of current flow to be within the desired parameters. The frequency, wave form and voltage of the impressed voltage wave and the current flow are all below a level which can damage typical living cells.

Abstract: A device for the automatic determination and recordation of rates of fluid absorption in soils, including a plurality of conductive probes which are positioned at various levels with regard to a provided water level such that as the water level drops, the time to accomplish the drop is recorded. The device provides a pair of timing and time recording devices interconnected with the probes such that two individual time sequences may be recorded.