Show t t CHRONOMETER PUT PUTTO TO TO TEST 0 ft It Is I. Kept on Ice to Secure Accurate Adjustment i Sack Back year the time z- z t of the e United States navy ar are sub sub- I tested Jested to to-a to test determine to their acY ac- ac Y curacy and and to correct any irregular irregular- ties tie This operation commences in January lanar and usually lasts until the middle of ot Juno June and during that time these feese 08 delicate timepieces are kept oa ou Ice fee at the United States naval atory It is not for any fear that they will spoil that they are subject subject- i eQ 4 to this frigid experience but it is necessary for the purpose of v t adjustment that they should all bs be b maintained in a constant temperature 1 The nece necessity of having a ships ship's clocks all absolutely alike will wUl be realized realized real real- Ird by the layman when he is reminded re re- ii r minded that an error of four seconds fa in 11 the chro chronometer ometer means an e error aror or of nC A 4 tile in calculating l the v vessels vessel's e l low k The different different dif dIt- Uon The temperature varies at Pf G t ferent ter-ent times of the test from 60 50 to 00 0 d degrees es and the losing or gaining qualities of ot the chronometers under these conditions are accurately kept Thus with a chart expressing in curves Just what he may expect from his bis 8 chronometer under different conditions conditions conditions condi condi- of climate and with his thermometer thermometer thermometer ther ther- and barometer close at hand a sailing master may calculate to a nicety ety the correct time and get his location to a certainty |