Show transmits correct time f aw 4 paul one of the astronomers at the united states naval observatory atory at washington D C Is the man who tells the world when it Is noon the cylinder nt at which he stands Is a chronograph connected with the standard clock which is 13 kept hept in a triple vault far underground where there th Is no vibration and no dust and where the temperature neier neer varies as much mi as one ono one hundredth part or of a degree when the chronograph shows that t the standard clock registers 1155 a in mr turns on an electric eleca switch A transmitting clock connected with the standard clock ticks off the seconds over radio and telegraph for the next nest five minutes A skip in the ticks gives the signal for noon and sets beta the clocks of the world |