DE. C. W. SIEMENS ON THE DYNAMO-ELECTRIC CURRENT. 
1083 
No. 13. 
Helix : 24 part commutator, 312 convolutions, 2 - 8 m.m. wire, ’234 S. U. resistance. 
Electro-magnets : 3200 convolutions, 2 - 8 m.m. wire, 7’563 S. U. resistance. 
Revolutions per 
minute. 
Resistance 
in S. U. 
Reading on. 
electro-dynamometer. 
Current in webers. 
E. M. F. in helix 
in volts. 
Horse-power. 
Percentage of 
energy turned 
into useful work. 
In 
outer 
circuit. 
Total 
in 
circuit. 
Helix. 
Electro¬ 
magnet. 
Outer 
circuit. 
Helix. 
Electro¬ 
magnet. 
Outer 1 
circuit. 
Ex¬ 
pended. 
Total 
developed. 
Developed 
in outer 
circuit. 
450 
no 
1-12 
140 
105 
27-59 
23-91 
28-85 
1-47 
1:02 
•715 
48-63 
5(/0 
185 
150 
31-72 
28-56 
33-16 
1-94 
1-41 
1-02 
52-57 
550 
250 
195 
36-88 
32-57 
38-56 
2-47 
1-91 
1-33 
53-85 
600 
325 
260 
42-05 
37-61 
43-97 
306 
2-48 
1-77 
57-84 
650 
400 
305 
46-64 
40-73 
48-77 - 
3-71 
3-05 
2-08 
56-06 
700 
470 
350 
50-56 
43-64 
52-87 
4-43 
3-58 
2-38 
53-72 
750 
530 
395 
53-69 
46-35 
56-14 
5-20 
3-91 
2-69 
51-73 
800 
640 
460 
58-98 
50-03 
61-69 
5-88 
4'86 
3-13 
53-23 
850 
700 
510 
61-69 
52-66 
64-51 
6-42 
5-33 
347 
54-05 
900 
785 
570 
65-33 
55-67 
68-31 
698 
5-98 
3:88 
55-59 
850 
700 
505 
61-69 
52-41 
64-51 
6-42 
5-33 
3-44 
53-58 
800 
600 
440 
57-12 
, , 
48-92 
59-73 
5-71 
4-57 
2-99 
52-36 
•750 
510 
372 
52-66 
44 98 
55-07 
4-90 
3-89 
2:53 
51-63 
700 
440 
330 
48-02 
« O 
42-37 
51-15 
4-14 
3-35 
2-25 
54-35 
650 
350 
270 
43-64 
38-32 
45-63 
3-45 
2-67 
1-84 
53-33 
600 
9f 
285 
220 
39-47 
34-60 
41-27 
2:82 
2-18 
1-5 
53-19 
550 
240 
180 
36-14 
31-30 
37-79 
2-24 
1-83 
1-23 
54’91 
500 
180 
135 
31-30 
27-09 
32-73 
1-73 
1-37 
•918 
53-06 
450 
” 
135 
100 
27:09 
•• 
23-32 
28:33 
1-28 
1 03 
:6S1 
53-20 
No. 14. 
Helix : 24 part commutator, 312 convolutions, 2 - 8 m.m. wire, '234 S. U. resistance. 
Electro-magnets : 2240 convolutions, 3 m.m. wire, 4’46 S. U. resistance. 
Revolutions per 
minute. 
Resistance 
in S. U. 
Reading on 
electro-dynamometer. 
Current in webers. 
X 
o 
d 
. o 
a 
Horse-power. 
Percentage of 
energy turned 
ii to useful work. 
In 
outer 
circuit. 
Total 
in 
circuit. 
Helix. 
Electro¬ 
magnet. 
Outer 
circuit. 
Helix. 
Electro¬ 
magnet. 
Outer 
circuit. 
Ex¬ 
pended. 
Total 
developed. 
Developed 
in outer 
circuit. 
505 
CO 
470 
23 
23 
11-19 
11-19 
49-01 
1-34 
*736 
510 
7-0 
2 96 
55 
• • 
9 
17-29 
6-99 
47-79 
1-77 
1-11 
•428 
24-18 
502 
6-0 
2-8 
60 
, # 
12 
H-06 
8-08 
47-21 
1-74 
1-14 
■490 
28-16 
502 
5:0 
2:6 
65 
18 
14 
18-80 
9-89 
8-88 
45-64 
1-74 
1-15 
•493 
28-33 
492 
4'5 
2-48 
65 
16 
16 
18-80 
9-33 
9-32 
43-53 
1-71 
1-10 
•489 
28-60 
515 
3-0 
2-03 
120 
15 
40 
25'55 
9-03 
14-75 
48-43 
1-71 
1:66 
•817 
47‘78 
2-5 
1-84 
125 
14 
53 
26-07 
8-88 
16-98 
44-79 
1-99 
1:57 
•9u2 
45-32 
494 
2-0 
1-62 
145 
13 
7 
28-08 
8-40 
19-51 
42-47 
1-91 
1-60 
■953 
49-39 
1-5 
1-36 
180 
10 
100 
31-30 
7-37 
23-32 
39-75 
2:01 
1-67 
1-02 
50-74 
508 
1-25 
1-22 
210 
130 
33-80 
26-o8 
38-50 
2-18 
1-74 
1-10 
50-46 
512 
1-0 
1-06 
260 
9 
170 
37-61 
6-90 
30-41 
32-73 
2-40 
P65 
1-16 
48-33 
515 
1:0 
1-06 
280 
, , 
180 
39-03 
. . 
31-30 
3b"65 
2-41 
2:02 
1-23 
51-03 
506 
•9 
•99 
295 
205 
40-06 
83-39 
36-93 
2-37 
1-98 
1-25 
52-74 
515 
■8 
•92 
220 
7 
220 
34:60 
6-17 
34-60 
29-72 
2-52 
1-38 
1-20 
47-61 
*.* 
•7 
•84 
295 
, , 
222 
40-06 
34-75 
31-42 
2-52 
1-69 
1-05 
41-67 
498 
•3 
•52 
95 
2 
75 
22-73 
3-29 
20-20 
11-04 
0-71 
•336 
•153 
2T55 
510 
•6 
•77 
280 
5 
200 
39-03 
5-21 
32-98 
28:06 
2-18 
1-47 
■817 
37-48 
•5 
•69 
2 4 5 
210 
38-68 
33-80 
24-92 
2-42 
1-29 
•715 
29-54 
6 z 2 
