icago, 111. A which presses against the blade when inserted, the At a recent meeting of the Royal Microscopical So- blade being quickly adjusted in correct position by diamond-shaped base plate of insulating material has ciety, Dr. J. E. Talmage, of Salt Lake City, Utah, ex- means of two screws. on… … FISHERS BURGLAR ALARM, headed face cards that have absolutely the same aspect in both directions. the small figure, the center of each plate having an The following is the manner in which the opening for a screw, and these screws being con- operator can recognize the card inverted. ductors. A third…
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