London, May 7.—To play on a violin without strings, the violinist being in a distant room, way one f the miracles of a new electrical ry demonstrated at the Institution of Electrical Engineers last night by two Danish scientists.
Alfred Johnson and Kuud Rah-ber, of Copenhagen, have been making and developing many wonderful appliances based upon an electrical principle they dis covered in 1917, and they. have come to England to demonstrate the principle to British electrical experts.
Wonpen d Experi Briefly, says the Daily Chronlcle," the principle "discovered is that when an electrical "pressure"
applied between certain. subjstavees they will adhere firmly. Thus a current applied in. this to a lithographic stone and piece of metal will cause the one to stick firmly to another. this stone, some kinds vt limestone, flint, agate, skin paper show the same can even be got with bone and animal mem-but there is no electrostatic ion in the case of true in
Text read from the printed page and cleaned; old type leaves the occasional error.