MR. G. GORE ON ELECTROTORSION. 
549 
riments ; the pointer also was at zero, and the same zero was maintained throughout 
the whole of the experiments. 
(A) Residuary effect of coil-currents. — First Series. With up ward axial currents, the 
first being preceded by a coil one, producing a north pole below : — 
i 
1. 2-0 «« 
5. 1 ’5 
9. 1*75 
13. 1*25 -nsg 
17. 1*25 -Hsg 
S. 
2. 1*25*+ 
6. 1*25 
10. 1*25 ssh- 
14. '75 m+ 
18. 1*00 »+ 
3. 5*5 
7. 5*25 
11. 4*75^h- 
15. 5*00 ^-+- 
19. 4*75 
N. 
4. 2*7 5 -Has 
8. 3*25 
12. 3*50-h^ 
16. 3*25 i-m 
20. 3*50 -Has 
5)7*75 
Averages 1*55 
5)5*50 5)25*25 5)16*25 
1*1 5*05 3*25 
The largest torsions were produced by axial currents, and the smallest by coil ones ; 
therefore the former left the smallest residual effect. Upward axial currents succeed- 
ing coil ones which produced a south pole below, gave larger torsions than those 
succeeding coil ones which yielded a north pole, in the proportion of 5*05 to 1*55; 
therefore coil-currents producing a south pole below left a larger residual effect than 
those producing a north pole. These two numbers exhibit a greater difference than 
those previously found (see Section 16, p. 539). 
Second Series. With ^owwward axial currents, the first being preceded by a coil one 
producing a south pole below .* — 
1 
N. 
I 
S. 
1. 3*8 
2. 3*5 w>+ 
3. 3*0 
4. *5 -Hgg 
5. 3*75 
6. 3*3 
7. 2*8 
8. *5 
9. 4*0 -*-m 
10. 2*75^- 
11. 2*25^+ 
12. *0 
13. 4*0 -hk 
14. 3*5 m+ 
15. 3*10 
16. *0 
17. 4*0 -hk 
18. 3*3 m>+ 
19. 3*75 ^+ 
20. *0 
5)19*55 
5)16*35 
5)14*90 
5)1*0 
Averages 3*91 
3*27 
2*98 
*2 
The largest torsions were caused by the axial currents, and the smallest by coil ones. 
Downward axial currents succeeding coil ones which produced a south pole below gave 
larger torsions than those succeeding coil ones producing a north pole, in the propor- 
tion of 3*91 to 2*98. 
(B) Residuary effect of axial currents. — First Series. With coil-currents producing a 
north pole below, the first axial one being preceded by a coil one in that direction : — 
