Abstract: A method of adjusting wheel loading in a trailer having a trailer body with apertured channel members on the bottom, a wheel bogie having a braking mechanism and a pair of apertured channel members on the top thereof which engage the channel members of the trailer body to permit relative sliding movement between the trailer body and the wheel bogie, a locking mechanism having a pair of movable locking pins for locking the trailer body to the wheel bogie when the locking pins are extended through the apertures in the channel members wherein the method includes the steps of assessing the wheel loading of the trailer, setting the brake of the wheel bogie, retracting the locking pins to permit relative movement between the trailer body and the wheel bogie, inserting a trailer slider stop pin in an aperture of each trailer channel at a position where the trailer body is to be stopped relative to the wheel bogie and moving the trailer body relative to the wheel bogie until movement of the trailer body is arrested b

Abstract: A hermetically sealed, electrically insulative enclosure (A) is surrounded by a Faraday cage (B). At least one electrode (C) is disposed within the hermetically sealed enclosure. The volume of the enclosure is selectively altered such that an initial charge density in the neighborhood of electrod changes, which changes the electrode potential. The change causes a current to flow to or from the electrode which returns the electrode potential and the electrode surrounding space charge toward an equilibrium condition. In one embodiment, a current measuring circuit (D) is disposed between the electrode and the Faraday cage to derive a measure of the current flow therebetween. In another embodiment, a like electrode is disposed within another hermetically, sealed insulative enclosure which is shielded by the same or another Faraday cage. In the second embodiment, the measuring circuit measures the current flow between the two isolated electrodes.