108 Mr Barlow on the Laws of Electro-Magnetic Action. 
down, the wire at each compass was raised to 1| inches above 
the needle, and a double set of observations obtained with this 
distance, precisely in the same manner, after which the battery 
was raised out of the fluid, while the wire was shortened and 
readjusted. This being premised, the following Table of re- 
sults will be readily understood. 
TABLE (^Experimental Results^ shewing the Deviation of Compass- 
Needles at different Distances ^ and with different Lengths (ff Con- 
ducting Wire. 
Length 
of con- 
ducting 
Wire. 
Deflec- 
tion of 
Standard 
Compass 
■ A. 
Deflection of the other Com- 
passes — Distance 4 Inch. 
Deflec- 
tion of 
Standard 
Compass 
A. 
Deflection of the other Com- 
passes — Distance I4 Inch. 
Deflec- 
tion Com- 
pass B. 
Deflec- 
tion Com- 
pass C. 
Deflec- 
tion Com- 
pass D. 
Deflec- 
tion Com- 
pass .B. 
Deflec- 
tion Com- 
pass C. 
Deflec- 
tion Com- 
pass D. 
Feet. 
0 
0 
21 
5 
5 
44 
838 4 
21 
5 
5 
5 
w 1 
25 
6 
C4 
. 
798 J 
23 
64 
6 
64 
25 
8 
9 
71 
758-^ 
L 
25 
8 
9 
71 
( 
r 
25 
9 
10 
8 
7181 
1 
25 
8 
10 
8 
i 
[ 
27 
8 
104 
9 
678 j 
25 
8 
104 
9 
[ 
25 
104 
11 
11 
638^ 
L 
26 
10 
104 
io| 
f 
26 
104 
104 
10 
598 j 
F 
26 
10 
11 
10 
L 
[ 
26 
104 
114 
10 
558 j 
26 
104 
111 
9 
[ 
29 
114 
13 
114 
518 -j 
29 
111 
13 
124 
30 
13 
14 
124 
478 j 
30 
124 
14| 
HI 
\ 
30 
14 
15| 
134 
438 j 
1 
30 
14 
15 
13 
0 
0 
0 
[ 
31 
14 
15| 
134 
31 
3| 
3| 
3'* 
398 j 
L 
30| 
144 
15| 
134 
31 
34 
3| 
3 
[ 
31 
15 
16 
144 
314 
3 
4 
34 
358 -| 
32 
15 
16 
14| 
314 
H 
5 
4 
\ 
34 
16 
17 
18 
35 
3 
4| 
4 
318 j 
34 
16 
17 
18 
35 
4 
4i 
44 
278-1 
34 
17 
171 
171 
36 
4 
4 
4| 
34 
164 
171 
171 
36 
4 
5 
5 
35 
18 
18| 
18 
34 
^1 
5 
H 
2381 
35 
19 
184 
18 
34 
5 
6 
5 
34 
19 
20 
18| 
34 
^1 
^1 
6 
1981 
334 
19 
194 
174 
34 
5 
5 
54 
1 RO 
344 
22 
214 
204 
36 
6 
6| 
7 
loo H 
344 
22 
22 
204 
34 
6 
7 
7 
1 1 o ' 
34 
24 
23 
224 
34 
7 
8 
71 
llo i 
33 
24 
22 
23 
34 
71 
8 
74 
Oft J 
r 
324 
24 
254 
25 
32 
8 
9 
8| 
uo 
1 
32 
23 
25 
254 
32 
8 
9? 
8| 
