Show new an improved stop watch has town been designed tor for athletic events which will time contests to one twenty fifth ot of a second ft 40 0 A japanese scientist has baa dev developed elopeS electrical apparatus to warn of earthquakes by translating their pro limIn ary tremors into sounds 4 40 A new electric lamp with vry very flondor filaments of aluminum has ha a highly destructive action on cultures ot of microorganisms A new apparatus for telephoning and telegraphing by wireless to an airplane in flight has been tested in ill prance francs A baltimore signal engineer has baa devised a control for traffic lights that can be operated by an automobile horn horna a sound waves A swedish engineer has invented a device that records incoming telephone none calls repeating them later tor for the person lor for whom they are intended 40 made in the lorm form or of flashlights cartridges to be loaded into fire alre arms to S shoot hoot beams ot of light at targets have been invented in england |