The National Geographic Magazine, Volume 92National Geographic Society, 1947 - Geography Indexes kept up to date with supplements. |
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Page 401
... clocks are that much wrong , and the next time signal is sent 1 / 100th of a second sooner than it otherwise would be . Of the Observatory's seven master clocks , three are run by pendulums and four by vi- brating crystals . The ...
... clocks are that much wrong , and the next time signal is sent 1 / 100th of a second sooner than it otherwise would be . Of the Observatory's seven master clocks , three are run by pendulums and four by vi- brating crystals . The ...
Page 423
... clocks to open the massive steel doors in 18 hours , at 8:30 the next morning . These four clocks , at Riggs National Bank , Washington , D. C. , can be set as far ahead as 72 hours . At week ends the clocks are set at 3 p . m . Friday ...
... clocks to open the massive steel doors in 18 hours , at 8:30 the next morning . These four clocks , at Riggs National Bank , Washington , D. C. , can be set as far ahead as 72 hours . At week ends the clocks are set at 3 p . m . Friday ...
Page 425
... clock , a radical departure from the long- case clock . Often Terry traveled on horseback , carrying as many clocks as he could . When the weather looked threatening , the story goes , he would leave a clock at a farmer's house with the ...
... clock , a radical departure from the long- case clock . Often Terry traveled on horseback , carrying as many clocks as he could . When the weather looked threatening , the story goes , he would leave a clock at a farmer's house with the ...
Contents
Adventures with the Survey Navy By Irving Johnson 131 | xxi |
Carnival in San Antonio Texas By Mason Sutherland With 19 illustrations in color | xxvii |
Desert River San Juan Through Navajo Land By Alfred M Bailey With 11 illus | xxxiii |
Copyright | |
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