Remarks before the Princeton Bicentennial Conference on problems in mathematics

Means for mounting a body, such as a furnace humidifier to a thin wall, such as the wall of a warm air duct in registry with an opening therein. In particular, this invention relates to a means which requires no metal working or hole making other than providing an opening in the wall. The mounting means is a multipiece frame which is adapted to pressingly engage the wall at the edges defining the opening therein. Several of the brackets which make up the frame are equipped with one or more rotatable clamps which may be moved to a body holding or body releasing position. The clamps, when in body holding position, engage the body and press it to the duct. When in body releasing position, the clamps disengage the body and allow it to come free of the duct. Thus, the body can easily and quickly be mounted or dismounted without the use of tools or removal of screws.