Abstract: Apparatus and method are disclosed for demonstrating autorotation in conjunction with superconductivity. First and second discs constructed of superconductive materials are stacked one on top of the other in an insulated container. A disc-shaped permanant magnet is positioned generally in the center of the upper superconductive disc. Liquid nitrogen is poured into the container, and after the temperature of the discs is lowered to a temperature at which they become superconductive, the magnet is levitated by the Meissner effect and begins to rotate due to the stacked configuration of the superconductive discs.

Abstract: A method for repairing worn heels of shoes, which is comprised of a mold built on the worn part of the heel with a strip of aluminum foil on the sticky side of an adhesive tape that is adhered to the curved wall on the side of the heel to be repaired, for the repairing material to be poured into there. A repairing material, comprising of a synthetic rubber, butadienestyrene, dissolved in the organic solvent mixture which is comprised of toluene, xylene, and amyl acetate, mixed with aramid fibers of various sizes, and a coloring material in a fluid mass for repairing worn heels and tears on straps and bands of shoes.

Abstract: Electrical conductors for use in microelectronic circuitry are prepared from a flexible, polymeric fiber selected from the group of flexible, polymeric fibers consisting of silk, polyacrylonitrile, regenerated cellulose, polyester, and polyamide. The selected fiber is made conductive by coating by a method wherein the fiber is immersed for a predetermined time period of from about 30 minutes to about 60 minutes in a solution prepared from equal portions of a silver nitrate-aqueous ammonia solution and a silver nitrate-potassium-sodium tartrate solution. These solutions coat the selected polymeric fiber with metallic silver. The excess solution is washed off and the coated fiber is air dried or dried in a low temperature oven at about 50.degree. C. The process is repeated if a heavier coating of silver on the fibers is desired for better conductivity. For use, the metallic silver coated fiber is cut to required length and tested for resistivity which should be near one ohm.

Abstract: Disclosed is a device for use in the colorimetric analysis of nickel in a emical plating solution. The device employs an automatic measuring system which includes a first automatic measuring system which comprises a means for transferring a chemical plating solution to be analyzed from a container to a first volumetric cup disposed to receive the solution into an inner section of the cup which is filled to overflowing into an outer section of the first volumetric cup. The outer section of the first volumetric cup has means for draining solution to the container. The first volumetric cup inner section is provided with drain means at bottom for draining the plating solution sample into an absorption cell. A second automatic measuring system is provided which comprises a means for transferring a standardized ammonium hydroxide solution by gravity flow from a second container to a second volumetric cup having an inner and outer section.