OP ELECTEIC SIGNALS THEOUGH SUBMAEINE CABLES. 
1007 
Table VII. — Arrival-curve for 1006 knots, in 4 coils. July 29, 1859. 
Maximum deflection caused by permanent current from 72 p.p. . . . 277*^. 
Seconds after making contact with battery or with I 
earth j 
H- 
2 
3 
4.1 
4| 6 
7 
94 
Ui 
19^ 
DiYision of scale passed by spot as current rises at far 1 
i end of hue J 
— 
— 
— 
200 
— 
2)0 
229 
— 
230 
— 
240 
250 
— 
270 
1 Division of scale passed by spot as current falls at far 1 
end of Hne J 
120 
110 
100 
— 
60 
— 
— 
50 
— 
40 
— 
— 
15 
— 
1 Distance on scale traversed by spot after contact has I 
been made with battery or with earth J 
157 
167 
177 
200 
217 
210 
220 
227 
230 237 
240 
250 
262 
270 
Reduced distance traversed by spot after contact has \ 
been made with battery or with earth J 
567 
60-3 
63-9 
72-2 
78-3 
75-8 
79-4 
81-9 
83 85-6 
86-6 
90-2 
94-6 
97-5 
Table VIII. — Arrival-curve for 1165 knots, in 6 coils. July 29, 1859. 
Maximum deflection caused by permanent current from 72 p.p. . . . 264*^. 
Seconds after making contact with battery or with earth 
2|- 
3| 
3| 
7 
9 
10 
17 
23 
Division of scale passed by spot as the current rises at far end of line 
— 
200 
— 
220 
— 
240 
— 
— 
260 
Division of scale passed by spot as the current falls at far end of line 
70 
— 
60 
— 
30 
— 
20 
10 
— 
Distance on scale traversed by spot after contact has been made with battery or 1 
with earth J 
194 
200 
204 
220 
234 
240 
244 
254 
260 
Reduced distance traversed by spot after contact has been made with battery or I 
with earth J 
73-5 
75-8 
77-3 
83-4 
887 
91 
92-5 
96-3 
98-5 
Table IX. — Signals through 1165 knots, in 6 coils. July 29, 1859. 
Maximum deflection caused by permanent current from 72 p.p. . . . 264*^. 
9 
O 
t 5 
s i 
* M 
w 
c 
£ 
•f 
& 
x 
't’S a 
til 
fa 1 * 
o c 
OQ-- 
Duration of contact 
at near end. 
Limit of doUoction 
at far end. 
First observation. 
Second observation. 
Mean limit of 
deileetion caused by 
contact. 
1 1 
S 
^ = .s 
S.2 ^ 
PJ- 
W O 
III 
c:- ^ 
H o-^ 
K g 
Diagrams showing changes of current caused at far end of line 
by the signals. 
Vertical scale y^th of an inch = 1 division (strength of current). 
Horizontal scale -^th of an inch = 1 second (time). 
10 
100 
Dots. 
72 p.p, 
E. 
06 
06 
130 
100 
125 
95 
1274 
974 
48-3 
36-9 
11-4 
dots 
clashes 
do tslc dashes 
AA 
Dashes. 
72 p.p. 
E. 
1-2 
0 6 
190 
130 
— 
190 
130 
72 
49 3 
227 
AAA 
A-/1U-A- 
xuu 
Dots 
and 
dashes. 
72 p.p. 
E. 
72 p.p. 
E. 
0-6 
0-6 
1-2 
0-6 
150 
no 
180 
120 
145 
105 
180 
120 
1474 
1074 
180 
120 
55-9 
407 
68-2 
45-5 
A|AAAA 
v\pl 
A. 
72 p.p. 
E. 
72 p.p. 
E. 
0 6 
0-6 
1-2 
1-2 
115 
70 
170 
90 
— 
115 
70 
170 
90 
43-6 
26-5 
64-4 
34- 1 
II 1 1 1 1 1 \ 1 ] r 0 
