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Show 24 EXCHANGE OF SIGNALS. Signals sent from the Washington Observatory. On the 19th of May the first signals to Carl in were at intervals of one second, and were sent by so arranging the apparatus that the clock broke a closed circuit at each second. These signals could not be used at Caiiin. Afterward an attempt was made to send signals by causing the clock to close an open circuit, but these signals failed to get through. So much objection was made at Carlin to the clock- signals that signals were sent, finally, at iutervals of ten seconds, with an ordinary message- key, by breaking the circuit in coincidence with the beat of the clock as indicated by the sounder in the local circuit. Similar signals were sent on the 23d and 24th of May. On the 16th of June signals were sent, at intervals of ten seconds, directly from the clock, by switching the clock into the main line at the proper time to enable it to break the circuit at the desired second. Signals sent to the Observatory. Signals from Carlin and Austin were received on the Observatory chronograph. Exchange of signals between Washington, D. C, Detroit, Mich,, and Carlin, Sev. MAY 19,1871.- Signals sent from Washington. WaSKSf. t° n | Detroit clock. h. m. 8. | h. w. 8. 17 35 0.00 17 11 30.75 36 37 10.00 I 20.00 0.00 I 10.00 20. 00 30. 00 40.00 f'O. 00 0.00 40.70 50.77 30.77 40.83 50.86 0.89 10.91 i 20.90 I 30. 86 Carlin chro- i nometer. Il h. m. 8. 10 44 45.2 55. 45 5. 45 45. 55. 46 5. 15. 25. 35. 44. Washington h. m. 17 37 38 Mean. 17 36 clock. 8. 30.00 40.00 50.00 0.00 10.00 20.00 30.00 52.94 Detroit clock. K 17 17 m. 8. 14 0.90 10.82 20.85 30.80 40.82 50.81 15 0.82 13 23.78 Carlin chronometer. h. m. 8. 10 47 15.00 24.80 34.90 45.00 55.00 48 4.80 14.90 10 46 38.06 MAY 23, I871.- Si. 7> ktf* sent from Washington. Washington clock. h. m. 18 35 36 37 8. 0.00 10.00 20. 00 bO. OO 40.00 50.00 0.00 0.00 10.00 20. 00 30. <; 0 40.00 Detroit clock. 1 h. 18 m. 11 12 13 14 8. 1 45. 19 55. 2e 5.23 15.27 25.20 35.19 44.99 . 45. 05 ' 55. SO , 5.16 15.11 , 25.05 , Carlin chronometer. h. 11 m. 28 29 30 31 s. 4f. 30 5K ra) 8. 50 18. 50 2*. 40 38. 40 4e. 10 48.10 5*. 00 8.00 17.90 28.00 Washington clock. h. 18 Mean, 18 w. 37 38 39 40 37 8. 50.00 0.00 0.00 10. 00 20. 00 30.00 40.00 50.00 0.00 30.00 Detroit clock. h. 18 18 m. 14 15 16 14 8. 35.11 45.05 45.18 55.18. 5.00 15.00 25.00 35. 00 45.20 15.15 Carlin chronometer. h. 11 11 m. 8. 31 37.90 47.90 32 47.70 57.60 33 7.60 17.60 27.60 37, 00 47.60 31 18.02 |