OCR Text |
Show CHRONOMETER PUT TO TE0T It Is Kept on lee to Secure Accural Adjustment. V.uch )ear the time chronutiieier of the United States navy are sub Jested to a test to determine their ac curnc) and to correct any irregularities. irregulari-ties. This operation commences in January anil usuall) lasts until the middle of June, and during that time thr.se delicate timepieces are kept on Ice at the United States naval observ ni.or). It Is not for nny Tear that they will spoil that the) ore subjected subject-ed to this frigid experience, but It I." t.eci rear) for the purpose of aci urate Pdjiistimnt that the) should all he maintained In n constant temperature. The necesslt) or having a ship's clocks all absolute!) allko will be real-h.td real-h.td b) the la) man when he Is re-n re-n tnded (lint an eiror tit four seconds in tin- clitonometer means an error of a mile In calculating tho vessel's loca-I loca-I tlon. The temperature varies nt dlf-I dlf-I ferenl tlmei ol the tnsi from 50 to I po degrees uml the losing or e.il'ilng eunlltlcj or the chronometers oiider tacse conditions are accurately 1 opt J Thus Jfltli a chart expression In curves Just' what he ma) expert from l.:n clitonometer under different conditions condi-tions ol climate, and. with his thermometer ther-mometer and tintometer close at band, n Hailing master ma) calculate to a nicety the correct time and get his location to n cei taint). |