1084 
DR. C. W. SIEMENS ON THE DYNAMO-ELECTRIC CURRENT. 
No. 15. 
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. 
o 
cl 
CO 
o . 
t? 3 
3 p 
o a 
o Q 
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. 
700 
■24 
•28 
•1 
•34 
2 
3-29 
, , 
1-044 
•28 
•0046 
,, 
•2 
•43 
3 
4-03 
1-617 
•28 
•0087 
712 
•3 
•52 
14 
10 
8-88 
7-37 
4-311 
■29 
•0513 
•0204 
7-034 
698 
•4 
•61 
15 
12 
9-03 
8-07 
5-143 
•28 
■0622 
•0326 
11-64 
712 
’0 
•69 
370 
4 
305 
44-86 
4-66 
40 73 
28-89 
2-61 
1-74 
1-04 
39-84 
715 
■6 
'77 
510 
6 
370 
52-66 
571 
44-86 
37-86 
3-50 
2-67 
151 
43-14 
*75 
•88 
570 
360 
55-67 
44-25 
45-74 
4-08 
3-4 L 
1-83 
44-85 
720 
l-o 
1 06 
630 
15 
335 
53-69 
9-03 
42-69 
53-14 
4-10 
3-82 
2-28 
55-61 
714 
1-25 
1-22 
440 
18 
260 
48-93 
9-89 
37-61 
55-73 
4-08 
3-66 
2-21 
54 - 16 
708 
1-5 
1-36 
410 
21 
215 
47“23 
10-69 
34-20 
59-97 
4-05 
3-80 
2-20 
54 32 
700 
2-0 
1-62 
325 
25 
150 
42-05 
11-68 
28-56 
63-60 
4-00 
3-58 
2-04 
51-00 
712 
3-0 
2-03 
230 
32 
80 
35-37 
13-19 
20-86 
67-04 
3-48 
3-18 
1-63 
46-83 
CO 
4-7 
50 
** 
16-65 
•• 
•• 
2-47 
•• 
No. 16. 
Helix : 24 part commutator, 288 convolutions, 
Electro-magnets: 3916 convolutions, 2'5 m.m. 
3 m.m. wire, '173 S. U. resistance, 
wire, 11'26 S. U. resistance. 
Revolutions per 
minute. 
Resistance 
in S. U. 
Reading ou 
electro-dynamometer. 
Current in webers. 
E. M. F. in helix 
iu 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. 
612 
o-o 
•25 
640 
•25 
•418 
, . 
•25 
, , 
, . 
625 
*5 
■652 
4 
, , 
4-66 
2-84 
•25 
•018 
620 
•75 
•876 
97 
90-0 
22-97 
22-12 
18-8 
•76 
•579 
•46 
60-6 
630 
l-o 
1-09 
220 
2-0 
190-0 
34-6 
3-3 
32-14 
35-21 
2-44 
1-63 
1-29 
52-86 
630 
1-25 
1-29 
225 
3-0 
190-0 
34-98 
4-04 
32-14 
41-13 
2-57 
1-93 
1-61 
62-64 
635 
1-5 
1-5 
205 
3-5 
170-0 
33-39 
4-36 
30-41 
46'76 
2-59 
2-09 
1-73 
66*79 
636 
1*75 
1-69 
185 
3-5 
145-0 
31-72 
4-36 
28-08 
50-05 
2-46 
2-13 
1-73 
70-32 
638 
20 
1-87 
165 
4-0 
120-0 
29-96 
4-66 
25-55 
52-3 
2-47 
2-10 
1-63 
65-99 
628 
4*5 
3-38 
68 
6-0 
32-0 
19-23 
5'71 
13-19 
60-69 
2‘05 
1-56 
•98 
47"S6 
624 
6'5 
4-29 
42 
7-0 
15-0 
15-11 
6-16 
9-03 
60-52 
1-91 
1-22 
•66 
34-55 
635 
9-0 
5-17 
32 
7-5 
8‘5 
13-19 
6-39 
6-8 
63-67 
1-81 
1-13 
•521 
28-78 
610 
11-0 
5’7 3 
25 
7-0 
7-0 
11-68 
6-16 
6-L6 
62-49 
1-62 
•98 
•522 
32-22 
614 
eft 
11-43 
8 
8-0 
6 - (5 
6’6 
70-43 
1-25 
•623 
