Show A RADIUM CLOCK GOOD FOR THIRTY THOUSAND YEARS The cut n herewith la III the radium cluck clock which IH III ex lo 10 run for fOI year at ut leant In Ih the clock I IHu III Hu 1 one twelfth of a It 1 of uC radium over a iii p a 11 which of or two t h I n of fit diver HollI charged with electricity fro from PI the Ihl radi radl radium um hone move apart un until til III I they h touch the IheI I ot the vacuum um tube In which 1 limy am arC fixed They nIl ate In tho their II charge to 10 an Mil aluminium wire which ring 1 a abell bell and aulI being fal together again lo 10 repeat tho Indefinitely fill dc I vice 1111 waH In III Invented vented by hy a on of If Lord ho Iho of nf I argon and III hr n II Inner of ot the I t prill |