Abstract: An inductor or eductor that includes two or more tanks or receptacles that have different volumetric sizes and correspondingly proportional graduate scales by which different incremental volumes of fluids, dry powders, granular materials, etc. can be accurately measured therein. The outlets of the tanks or receptacles are plumbed together so that material in each can be simultaneously evacuated out and into a fluid supply line. Use of the inductor or eductor together with one-way, dry-disconnect valves provides a closed system by which materials such as agricultural chemicals can be accurately, measured, dispensed and transferred.

Abstract: An exercise, training and conditioning apparatus for skaters which includes a pair of movable foot platforms that are guided along a pair of coupled track sections, and a latching mechanism that alternatively secures and releases one of the pair of foot platforms while releasing and securing another one of the pair of foot platforms. According to one embodiment, the pair of track sections are coupled together at 90.degree.. Resistance to movement is applied to the pair of foot platforms by elastic or inelastic cables.