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 for the heyday of Theosophy and his findings were incorporated into Arthur E. Powell's book "The Etheric Double". Powell rightly made clear that Kilner had expressly differentiated between his own work and the clairvoyance and eastern systems of spiritualism. In the "British Medical Journal" (BMJ) a review for Kilner's research stated that although Kilner contended the aura is a "purely physical phenomenon", evidence does not support this view. Scientists from the BMJ attempted to replicate Kilner's experiments but the results were negative. The review concluded that "Dr. Kilner has failed to convince us that his "aura" is more real than