THE TRANSATLANTIC LONGITUDE. 



63 



December 16. 



Heart's Content clock-corrections. 



T 

 2" 25"" 

 30 

 35 

 40 

 45 

 50 



2 55 



3 



— 1'.092 

 .090 

 .087 

 .085 

 .082 

 .080 



.on 



— .075 



Calais clock-corrections. 



tit" 



—2 58.266 

 .214 

 .281 

 .288 

 .295 

 .303 

 .311 



—2 58.318 



We have thus from the Heart's Content signals, recorded at Calais- 



Date. 

 1866, December 11. 



December 12. 



December 14. 



December 16. 



T' 

 6" 46° 0" 

 T 8 



6 21 



7 29 30 

 7 57 30 



5 45 40 

 56 

 7 80 



27 50 

 38 30 

 50 



No. signals. 

 10 

 10 



10 

 16 

 12 



294 

 225 

 326 



229 

 223 

 222 



Difference of clocks. 

 0''52'"46'.09 

 46.09 



52 45.17 

 45.19 

 45.16 



52 43 56 

 43.55 

 43.55 



52 40.28 

 40.30 

 40.29 



M'—At' 



+ 2°5P.55 

 51.57 



+ 2 52.07 

 52.04 

 52.02 



-1-2 54.04 

 54.02 

 54 00 



-1-2 57.18 

 57.20 

 57.22 



and from the Calais signals, recorded at Heart's Content — 



Date. 

 1866, December 11. 



December 12. 



December 14. 



December 16. 



T' 

 6''38"12' 

 6 52 36 



26 40 

 22 50 



51 20 



40 



10 54 



14 25 



2 33 12 

 2 44 15 



2 55 30 



No. signals. 

 291 

 138 



223 



288 



292 

 177 



36 



96 



272 

 269 

 212 



Difference of clocks. 

 0''52'"46".59 

 46.58 



52 45.80 

 45.78 



52 44.10 

 44.09 

 44.09 

 44.16 



52 40.91 

 40.86 

 40.84 



At'— At" 



-1-2°'51^54 

 -f 2 51.55 



-f 2 52.07 

 -f2 52.04 



-t-2 54.03 

 54.01 

 53.99 



-f 2 53.98 



-f 2 57.19 



57.21 



+ 2 57.23 



X — x' 



0''55°'37'.64 

 37.66 



55 37.24 

 37.23 

 37.18 



55 37.59 

 37.57 

 37.55 



55 37 46 

 37.50 

 37.51 



0''55'°38M3 

 38.13 



55 37.87 

 37.82 



55 38.13 

 88.10 

 38.08 

 38.14 



55 38.10 



38.07 

 38.07 



From these we find the several values of the longitude and time of transmission- 



1866. ^ X 



December 11. 0" 55" 37'.89 0^24 



12. 37.53 0.31 



14. 37.84 0.27 



16. 37.78 0.28 



the longitude results requiring, however, a correction for personal equation. 



