Abstract: Diatomaceous earth in the powder form, to be used 1 when applied as a surface application to provide traction for pedestrians traversing icy walkways; 2 as a means of providing escape traction for vehicles which are hopelessly stuck on an icy highway; and 3 to provide sustaining traction when a vehicle is in motion on icy-covered highways for a long distance, as a result of the property of diatomaceous earth powder to cling to the drive-wheel tires.

Abstract: A heat storage unit is integrated with a collection unit providing a heat supply in off-sun times, and includes movable insulation means arranged to provide insulation during off-sun times for the heat storage unit.

Abstract: A stationary reflecting type solar radiation collector including a series of parabolic trough reflecting surfaces, each positioned to reflect incoming solar radiation in a generally vertical direction so as to form a concentrated line focus onto the overhanging collector heat systems arranged to provide heat collection at different seasons of the year as the focused line of heat energy moves horizontally with the changing angle of the sun. In one form, a heat storage unit is integrated with the collection unit providing a heat supply in off-sun times, and includes movable insulation means arranged to provide insulation during off-sun times for the heat storage unit.