458 



MEMOIRS OF THE AMERICAN ACADEMY 



MEAN RESULTS OF SIGNALS SENT FROM DUXBURY TO CAMBRIDGE. 





Date. 



1869 



Dec. 14 

 " 14 

 « 15 



« 



44 

 44 

 44 



15 

 23 

 23 

 31 

 31 



1870 



Jan. 3 



" 3 

 u 4 



u 14 



44 

 44 



u 



u 



44 



14 

 22 

 22 

 24 

 24 

 26 

 26 

 28 

 28 

 Feb. 9 

 " 9 



* 10 



* 10 



44 



44 

 44 



44 



Kind of Signal. 



Sidereal Clock, 

 Sidereal Clock, 

 Sidereal Clock, 

 Key or Hand, 

 Sidereal Clock, 

 Key or Hand, 

 Sidereal Clock, 

 Key or Hand, 



Sidereal Clock, 

 Key or Hand, 

 Sidereal Clock, 

 Cable Key, Class III., 

 Cable Key, Class II., 

 Cable Key, Class III., 

 Cable Key, Class IL, 

 Cable Key, Class III., 

 Cable Key, Class IL, 

 Cable Key, Class III., 

 Cable Key, Class II., 

 Cable Key, Class III., 

 Cable Key, Class II., 

 Cable Key, Class III., 

 Cable Key, Class II., 

 Cable Key, Class IV., 

 Cable Key, Class II., 



Number. 





58 

 59 



59 

 57 

 59 

 60 

 59 

 84 



59 

 57 

 59 

 63 

 48 

 70 



74 

 61 

 110 

 68 

 95 



62 

 112 

 59 

 61 

 54 

 20 







T x 



h m 



1 55 



2 17 



3 18 

 3 27 

 3 21 

 3 30 



3 55 



4 6 



3 58 



4 6 

 4 31 



3 59 



4 18 



4 43 



5 3 



4 54 



5 15 

 5 8 

 5 28 

 5 8 



5 28 



6 14 

 6 37 

 6 32 

 6 46 







T x 



T x 



'/ 



s 



24.156 

 24.185 

 12.776 

 12.746 

 6.290 

 6.262 

 12.345 

 12.323 



14.508 

 14.505 



15.218 

 9.522 



9.508 

 12.396 

 12.373 

 13.403 

 13.421 

 15.382 

 15 416 

 17.307 

 17.297 

 + 9.796 

 -j- 9.792 

 +10.241 



+10.256 



AT, 



AT, 



ft 



8 



134.443 

 134.486 

 123.083 

 123.108 

 116.727 

 116.737 

 122.741 

 122.742 



124.766 



124.774 



125.330 



120.695 



120.689 



122.893 



122.899 



124.027 



124.038 



125.654 



125.691 



127.608 



127.636 



100.974 



100.961 



100.244 



100.249 



X 



x 



110.287 

 110.301 



110307 



110.362 



110.437 



110.475 



110.396 



110.419 



110.258 

 110.269 

 110.112 

 110.173 

 110.181 

 110.497 

 110.526 

 110.624 

 110.617 

 110.272 

 110.275 

 110.301 

 110.339 

 110.770 

 110.753 

 110.485 

 110.505 





MEAN RESULTS OF SIGNALS SENT FROM CAMBRIDGE TO DUXBURY 



Date. 



1869 



Dec. 14 



44 



44 

 44 



44 



15 

 15 

 23 

 23 

 31 

 31 



1870 



Jan. 3 



3 



44 

 44 



22 

 24 



26 

 28 

 Feb. 9 

 " 10 



44 



44 



44 



Kind of Signal 



Sidereal Clock, 

 Sidereal Clock, 

 Key or Hand, 

 Sidereal Clock, 

 Key or Hand, 

 Sidereal Clock, 

 Key or Hand, 



Sidereal Clock, 

 Key or Hand, 



M. T. Clock, 

 M. T. Clock, 

 M. T. Clock, 

 M. T. Clock, 

 M. T. Clock, 

 M. T. Clock, 





Number. 



59 

 59 

 59 

 59 

 57 

 59 

 43 



59 

 46 

 50 

 50 

 50 

 50 

 50 

 50 



T 



h 



2 



m 



5 



3 33 

 3 39 

 3 37 



3 43 



4 13 



4 18 



4 12 

 4 15 

 4 12 

 4 26 

 4 29 



4 48 



5 33 

 5 25 





r 



T 



// 



8 



24.081 

 12.734 

 12.765 

 6.203 

 6.241 

 12.295 

 12.314 



14.478 

 14.496 

 12.355 

 13.361 

 15.299 

 17.240 

 9.790 



10.277 



AT 



AT 



fl 



134.462 

 123.126 

 123.143 

 116.744 

 116.750 

 122.744 

 122.744 



124.781 

 124.784 

 122.885 

 124.014 

 125.583 

 127.578 

 100.995 

 100.225 





Xfa; 



110.381 

 110.392 

 110.378 

 110.541 

 110.509 

 110.449 

 110430 



110.303 

 110.288 

 110.530 

 110.653 

 110.284 

 110.338 

 110.785 

 110.502 



