OF ELECTEIC SIGNALS THEOUGH STJBMAEINE CABLES. 
1005 
Table III. — Arrival-curve for 1500 knots, in 8 coils. July 27, 1859. 
Maximum deflection caused by permanent current from 72 p.p. ... 200*^. 
Seconds after making contact with battery 
81 
14 
33 
Division of scale passed by the spot as current rises at far end of bno 
170 
170 
180 
190 
200 
Eeduced distance traversed by spot after contact has been made with battery 
85 
85 
90 
95 
100 
Table IV. — Signals through 1500 knots, in 8 coils. July 27, 1859. 
Maximum deflection caused by permanent current from 72 p.p. . . . 200*^. 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 1 
1 
c 
c 
o ^ 
5 r 
P 
'a 
5 
= 11 
Z 
c s 
CO — 
Duration of contact 
at near end 
in seconds. 
Limit of deflection 
at far end, 
First observation. 
C 
.o 
O 
tS 
c 
o 
CQ 
o 2 . 
o o 
i'n 
Eeduced mean limit 
of deflection caused 
by contact. 
Eeduced mean 
amplitude of 
oscillation caused 
by two contacts. 
Diagrams showing the changes of current caused at the end of 
the line by the signals. 
Vertical scale of an inch =1 division (strength of current). 
Horizontal scale — th of an inch =1 second (time). 
10 
130 
Dots. 
72 p.p. 
E. 
0-462 
0-462 
85 
80 
— 
85 
80 
42-5 
40 
2-5 
— 1 
-^0 
0^ 10'> jo'’ .s'" 10’' 
100 
Dots 
and 
dashes. 
72 p.p. 
E. 
72 p.p. 
E. 
06 
0-6 
1-2 
0-6 
112 
100 
122 
110 
Ill 
95 
125 
no 
IIH 
m 
123i 
no 
55-2 
48-4 
61-7 
55 
Eeduced 
amplitude 
of corre- 
sponding 
dots 4d. 
J 
0 3" 30'/ 1 0 f 10'^ 
1 - 1 t r 1 1 1 1 1 1 j 1 1 r 1 1 _x. 1 1 1 1 
92 
Dots. 
72 p.p. 
E. 
0'652 
0-652 
85 
75 
— 
85 
75 
42-5 
37-5 
5-0 
j 
72 p.p. 
E. 
72 p.p. 
E. 
0-652 
0- 652 
1- 3 
0-652 
no 
95 
122 
105 
112 
97 
125 
108 
111 
96 
123^ 
106^ 
Dots 
and 
dashes. 
48 
61-7 
53-2 
— j— — I 
1 30 
O S" 1 0 cT" 10" 
_i 1 1 1 1 1 ] 1 1 L 1 1 1 — 1 — ! — ^ — 1 — 1 — 1 — L 
72 
Dots. 
72 p.p. 
E. 
0-833 
0-833 
95 
75 
— 
95 
75 
47-5 
37-5 
10-0 
1 
C ±0*^ j 0 
t t t I 1 1 1 I I 1 1 t 1 1 1 1 1 1 1 1 1 
Dots 
and 
dashes. 
72 p.p. 
E. 
72 p.p. 
E. 
0-833 
0- 833 
1- 666 
0-833 
115 
90 
130 
100 
112 
92 
135 
105 
113^ 
91 
132^ 
102i 
56-7 
45-5 
66-2 
51-2 
60 
Dots. 
72 p.p. 
E. 
1 
1 
100 
75 
— 
100 
75 
50 
37-5 
125 
1 so 
7YU\7W“ fXIaX- 
1 ZC 
0 3" M" 10 10'/ 
1 1 1 t 1 1 1 1 1 1 1 1 L 1 1 1 V 1 1 1 1 
Dots 
and 
dashes. 
72 p.p. 
E. 
72 p.p. 
E. 
1 
1 
2 
1 
116 
85 
140 
100 
121 
90 
140 
100 
1181 
871 
140 
100 
59-2 
43-7 
70 
50 
Table V. — Arrival-curv^e for 1802 knots, in 9 coils. July 28, 1859. 
Maximum deflection caused by permanent current from 72 p.p. ... 168'*. 
Seconds after making contact with battery or with earth 
6i 
7 
8 
lU 
^ ^ 2 
15 
Division of scale passed by the spot as the current rises at far end of line 
130 
135 
140 
145 
150 
155 
158 
Eeduced distance traversed by spot after contact has been made with battery 
77-3 
80-3 
83-3 
86-3 
89-2 
92-2 
94 
6x2 
