1008 ME. E. JENKIN’S EXPEEIMENTAL EESEAECHES ON THE TEANSMISSION 
Table X. — Arrival-curve for 1165 knots, in 6 coils. July 29, 1859. 
Maximum deflection caused by permanent current from -|-42 p.p. . . 
,, ,, ,, ,, ,, 30 P'P" 
Sum of the two deflections 
157 *^ 
113-1 
Seconds after making contact with positive 1 
battery or with negative battery J 
3 
4 
4 
4J- 
7 
9 
9 | 
13 
14 
17 
18 
1 
25 j 
1 
Division of scale passed by spot as the current "I 
arises at far end of line, after contact has been ^ 
made with positive battery J 
+90 
— 
+ 100 
+ 110 
— 
— 
+ 130 
— 
— 
+145 
— 
+150 
1 
+155! 
Division of scale passed by spot as the current I 
falls at far end of line, after contact has been > 
made with negative battery J 
- 
-60 
— 
— 
-70 
-80 
— 
-90 
-100 
— 
-105 
, 
1 
Distance on scale traversed by spot after contact 1 
with either battery J 
203 
217 
213 
223 
227 
237 
243 
247 
257 
258 
262 
263 
268 
Reduced distance traversed by spot after contact I 
has been made with either battery /' 
75-1 
80-3 
78-8 
82A 
84 
87-7 
89-9 
91-4 
95-1 
95-5 
96-9 
97-3 
99-2 
Table XI. — Signals through 1165 knots, in 6 coils, with alternate positive and negative 
currents. July 29, 1859. 
Maximum deflection caused by permanent current from -h 42 p.p. . . . 157-1 
,, ,, ,, ,, ,, ,, ,, —30 p.p. • • • llo 
Sum of two deflections 270-1 
Beats of metronome 
per minute. 
Signals sent. 
Source of electricity 
in contact wdtli line 
at near end. 
Duration of contact 
at near end. 
Limit of deflection 
at far end. 
First observation. 
Second observation. 
Mean limit of deflec- 
tion caused by 
contact. 
Eeduced mean limit 
of deflection caused 
by contact. 
Eeduced mean ampli- 
tude of oscillation 
caused by two contacts. 
Diagrams showing changes of current caused at far end of line 
by the signals. j 
Vertical scale of i^ch = 1 division (strength of current). ( 
Horizontal scale -i-th of an inch = 1 second (time). 
10 j 
100 
Dots. 
+42 
-30 
0-6 
0-6 
+35 
0 
+32 
- 3 
— H 
+12-4 
- 0-6 
13 
dots 
dashes dobs.'i^daslies, i j 
1 
Dashes. 
+42 
-30 
1-2 
0-6 
+95 
+40 
+95 
+35 
+95 
+m 
+35-1 
+13-9 
21-2 
1 1 
\l\[\r\ ] 71 /I i n 
di? . 
kA-- 
Dots 
and 
dashes. 
+42 
-30 
+42 
-30 
0-6 
0-6 
1-2 
0-6 
+40 
+ 10 
+80 
+20 
+55 
+20 
+85 
+25 
+474 
+ 15 
+824 
+224 
+ 17-6 
+ 5-6 
+30-5 
+ 8-3 
AiAAAA 
I ' 1 
I ! 
TXj ^ 1 
1 
A. 
+42 
-30 
+42 
-30 
0-6 
0-6 
1-2 
1-2 
+ 10 
-20 
+65 
-20 
— 
+ 10 
-20 
+65 
-20 
+ 1 + 1 
0 , . , . r io, , , , r 1 + . 1 r r so 
! 
