Abstract: Spiked shoes enable the wearer to kick the ground with a minimum loss of power. The spiked shoes have spikes secured to the toe and heel portions of the sole to extend across the longitudinal centerline of the sole. An additional spike is mounted to the sole at its intermediate portion between the toe and heel portions to extend across the fourth metatarsal of the wearer's foot. While the wearer is walking or running, the additional spike bears the wearer's weight at the root of the fourth toe. The wearer can thus kick the ground with a minimum loss of power. As a result, this spike cooperates with the spikes at the toe and heel portions to grip the ground firmly so that the wearer can kick the ground strongly even with the heels off ground.

Abstract: A hazardous waste incineration system is provided in which a series of interconnected combustion chambers are employed to obtain successively higher temperatures in successive chambers, the gaseous products of combustion in each chamber being supplied to the next chamber in the series to act as a high temperature environment and promote the burning of hazardous wastes in successive chambers which require successively higher temperatures to become volatilized and break down into their constituent elements. Preferably, the successive chambers have successively larger volumes so that successively greater amounts of hazardous wastes, which may be of successively lower heat values and require successively higher temperatures to be broken down, may be burned in the successive combustion chambers of the series.