Weck jar secured by steel tension clips which can be removed once a vacuum seal has formed. During storage the vertical position of the rubber seal's external tongue indicates the status of the sealing. Weck products are still produced and are available from German hardware and online stores. Used equipment is frequently sold on online auction sites and in opportunity shops. Weck jar A Weck jar is a molded glass jar used in canning to preserve food. It is popularly used for jam preservation, for its minimal look and foolproof rubber gasket with a glass lid. Weck jars were created by the
Walter John Kilner dyes, including a blue coal-tar dye called "dicyanin" were used as filters in "Kilner Goggles" which, together with lights, were held to train the eyes to perceive electromagnetic radiation outside the normal spectrum of visible light. After being so trained, one could dispense with the apparatus. Kilner did not recommend merely viewing the subject through these lenses. According to his study, Kilner and his associates were able, on many occasions, to perceive auric formations, which he called the Etheric Double, the Inner Aura and the Outer Aura, extending several inches from patients' naked bodies, and his book gave instructions by