86 



THE TRANSATLANTIC LONGITUDE. 



1866. 

 II. 1. Nov. 10. 



IV. 1. Nov. 16. 



B. Middle of battery to ground. 



Negative signals. 

 No. Xi + 032 

 5 0'.432 

 5 0.458 



Posi 



ive signals. 



No. 



a^a+iCa 



5 



0».396 



5 



0.422 



10 



0.409 



0.445 



0.524 

 0.558 



0.541 



Mean. 



No. of cells. 



aJi + aJjj 



Val. Newf. 



0".414 



4 20 



0.440 





0.427 







4 4 



C. Zinc to ground. 



II. 2. Nov. 10. 



4 



0.553 



4 



0.502 



0.528 





3 



0.719 



5 



0.468 



0.562 





7 



0.624 



9 



0.483 



0.545 



IV. 2. Nov. 16. 







5 

 5 



0.550 

 0.486 





10 



0.518 



20 



D. No GROUND CONNECTION. 



Longit. Nov. 5. 



10 



0.562 



10 



0.617 



0.590 





10 



.532 



10 



.578 



.555 





9 



.570 



9 



.612 



.591 





29 



0.555 



29 



0.602 



0.579 



Longit. Nov. 6. 



10 



0.513 



9 



0.518 



0.515 





8 



.494 



7 



.458 



.476 





18 



0.504 



16 



0.488 



0.496 



Longit. Nov. 9. 



10 



0.464 



10 



0.446 



0.455 





10 



.472 



10 



.508 



.490 





10 



.500 



10 



.489 



.494 





30 



0.479 



30 



0.481 



0.480 



IL 3. Nov. 10. 



5 



0.572 



5 



0.482 ■ 



0.532 





3 



.577 



4 



.506 



.536 





8 



0.574 



9 



0.494 



0.534 



IV. 3. Nov. 16. 



4 



0.554 



5 



0.540 



0.547 





5 



.494 



5 



.458 



.476 





9 



0.524 



10 



0.499 



0.511 



3 3 



3 10 



4 10 



4 20 



4 4 



And for a single cable (that of 1865) which went to earth at one end, while at 

 the other the electrical equilibrium was disturbed only by means of a condenser 

 through which the battery acted inductively, so that no real charge entered or left 

 the cable at the signal station, we have from ten cells at each station — 



