1082 
DR. C. W. SIEMENS ON THE DYNAMO-ELECTRIC CURRENT. 
No. 11. 
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. 
devolutions 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 
circuit. 
Ex¬ 
pended. 
Total 
developed. 
Developed 
in outer 
circuit. . 
598 
•3 
•52 
3 
1 
3 
4-04 
2-33 
4-04 
1-962 
•24 
•0106 
■00613 
2'554 
596 
•4 
•61 
4 
1 
3 
4'66 
2-33 
4-04 
2"655 
•24 
•0166 
•00817 
3 ; 404 
612 
*5 
70 
30 
1 
26 
12-77 
2-33 
11-89 
8-34 
•375 
•143 
•0884 
28"57 
•6 
; 79 
180 
2 
31-30 
3-30 
23-08 
•87 
•968 
620 
*6 
•79 
215 
2 
180 
34-20 
3-30 
31-30 
25-23 
1-77 
1-16 
•736 
41-58 
615 
*7 
•87 
280 
3 
240 
39-03 
4-04 
36-14 
31-71 
2-26 
1’66 
1-14 
50'44 
*7-5 
•917 
300 
4 
250 
40-40 
4'66 
36-88 
34-59 
2-51 
1-87 
1-28 
51"50 
600 
*85 
•998 
290 
4 
245 
39-72 
4-66 
36-50 
37-02 
2-571 
1-97 
1-42 
55-25 
612 
1-0 
1T1 
305 
6 
235 
40-73 
5-71 
35"75 
42-21 
2-87 
2-30 
1-60 
55’74 
1-25 
1-iO 
290 
7 
210 
39-72 
6-17 
33 80 
48-22 
2-86 
2-56 
1-80 
62-93 
598 
1-5 
1-48 
230 
8 
160 
35'37 
6°n0 
29-50 
4888 
2-81 
2-32 
1-63 
58-00 
615 
2-0 
1-81 
195 
10 
120 
32-57 
7-34 
25"55 
55-05 
2-89 
2-40 
1-63 
56'40 
620 
3-0 
2-38 
130 
12 
65 
26-58 
8-08 
18-80 
59-07 
2-66 
2-10 
1-33 
50-00 
625 
4*5 
3-05 
85 
14 
32 
21-50 
8-88 
13-19 
61-23 
2 ; 30 
1-76 
•98 
42-61 
, 
6-0 
3-59 
70 
15 
22 
19-51 
9-03 
10-94 
65-40 
2-16 
1-71 
•898 
41’57 
620 
7*5 
3-99 
55 
16 
16 
17-29 
9-33 
9-33 
64* 42 
1-89 
1-49 
•817 
42-22 
No. 12. 
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. IT. resistance. 
O 
GO 
o . 
•_3 
rH 3 
© 3 
Ph 
Resistance 
in S. U. 
Reading on 
electro-dynamometer, j 
Current in webers. 
E. M. F. in helix 
in volts.. 
Horsepower. 
Percentage of 
energy turned 
into 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. 
700 
7*5 
4 01 
80 
18 
18 
20-86 
9-89 
9 : 89 
78-10 
2-57 
2-18 
-918 
35 : 72 
6-0 
3 ; 59 
80 
17 
25 
20-86 
9-62 
11-68 
69-92 
2-57 
1-95 
1-02 
39 ; 69 
707 
4'5 
3-06 
95 
16 
35 
22-73 
9-33 
13-80 
61-94 
2-88 
1-97 
1-07 
37-15 
710 
3 0 
2-39 
165 
14 
90 
29-96 
8-88 
22-12 
66-85 
319 
2-68 
T84 
57"87 
704 
2-5 
2-12 
195 
12 
115 
32-57 
8-08 
25-01 
64-47 
3-59 
2-81 
1-96 
54-59 
716 
2-0 
1-82 
235 
9 
150 
35-75 
7-0 
28 ; 56 
60'75 
3-94 
2-91 
2-04 
51-77 
723 
1-5 
1-49 
315 
7 
220 
41-40 
6-17 
34-60 
57-60 
4-28 
3 20 
2 ; 25 
52-57 
715 
1-25 
1-31 
350 
6 
260 
43-64 
5-71 
37-61 
53‘38 
4-23 
3-12 
2-21 
52-25 
722 
1-0 
1-12 
385 
5 
300 
45 - 76 
5-21 
40-40 
47'85 
4-27 
2-93 
2-04 
47"77 
705 
•75 
•92 
i 370 
5 
305 
44-86 
5-21 
40-73 
38-53 
3-45 
2-31 
1*56 
45-21 
703 
•60 
•80 
300 
5 
270 
40-40 
5-21 
38-32 
30-18 
2-29 
1-63 
110 
48-03 
716 
•50 
•71 
150 
4 
100 
28-56 
4-66 
23-32 
18-94 
•292 
•7*25 
•34 
11-64 
710 
•40 
•62 
7 
1 
7 
6-17 
2-33 
6-17 
3-571 
•290 
•295 
•019 
6’552 
