Show special vault guards nations timepieces Time pieces washington A special vault has been built underground at the naval observatory here to house the clocks which keep keel the nations time it Is n vault within a vault the inner vault Is constructed of hollow hk we tile made so that hot water can be run through it in order to keep a standard temperature of 85 degrees there Is an 18 inch air space between the inner vault and the outer one which Is constructed of stone or cement both vaults are placed below the frost line by the time the new clock vault Is in operation the navy hopes to have two more Sho shortt rit clocks the clocks now in use have been telling the country what time it Is for the past 30 years and while still in good running order wi not su suffer ri er from the augmentation of ti two to new ew clocks |