1078 
DR. C. W. SIEMENS ON THE DYNAMO-ELECTRIC CURRENT 
No. 3. 
Helix : 24 part commutator, 312 convolutions, 2*8 m.m. wire, '234 S. U. resistance. 
Electro-magnets: 3916 convolutions, 2*5 m.m. wire, 11'26 S. U. resistance (con¬ 
nected parallel to outer circuit). 
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 
circuit. 
Ex¬ 
pended. 
Total 
developed. 
Developed 
in outer 
circuit. 
700 
o-o 
•24 
•29 
•25 
•48 
4 
4-66 
, , 
2-078 
•0129 
. , 
*5 
•72 
11 
7-74 
5-203 
•0540 
■> > 
*75 
•94 
285 
5 
255 
39-37 
5-21 
37-25 
34-56 
2-57 
1-82 
1-3 
50-58 
1-0 
1-18 
325 
6 
280 
42-05 
5-71 
39 03 
46-33 
3-47 
2-61 
1-9 
54"75 
1-25 
1-36 
300 
6 
250 
40-40 
5’71 
36-88 
51-3 
2-77 
2-13 
61-37 
1-5 
1 56 
276 
6 
205 
38-75 
5-71 
33-39 
55-81 
2-90 
2-09 
60-23 
1*75 
1-75 
230 
6 
170 
135-37 
5-71 
30-41 
57-79 
5» 
2 74 
2-03 
58-50 
2-0 
1-94 
215 
7 
158 
34-2 
6-17 
29-31 
61-95 
3-28 
2-84 
2-15 
65'54 
CO 
11-50 
11 
10 
0 
7*74 
7-37 
83-11 
1-29 
1 
•862 
•• 
No. 4. 
Helix: 24 part commutator, 312 convolutions, 2*8 m.m. wire, *234 S. U. resistance. 
Electro-magnets: 3916 convolutions, 2*5 m.m. wire, 11*26 S. U. resistance (con¬ 
nected parallel to outer circuit). 
Revolutions per 
minute. 
Resistance 
in S. U. 
Reading on 
electro-dynamometer. 
Current in webers. 
E. M. P. 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. 
758 
12-30 
6-11 
38 
9'0 
9 
14-38 
6-99 
6-99 
82-03 
2-78 
1-58 
•752 
27-26 
756 
8-90 
5-21 
49 
8-5 
14 
16-32 
6-77 
8-88 
79-38 
2-93 
1-74 
•878 
29-96 
734 
6-00 
4-15 
69 
9-0 
28 
1 19-37 
6-99 
12-34 
75-05 
3-0 
1-95 
1-14 
38-00 
758 
6-00 
4-15 
72 
9-0 
28 
19-79 
6-99 
12-34 
76-67 
3-09 
2-03 
1-14 
36-89 
750 
4-50 
3-43 
85 
9-0 
34 
21-50 
6-99 
13-61 
68-85 
3-21 
1-98 
1-04 
32-40 
756 
3-50 
2-91 
150 
7-0 
87 
28-56 
6-17 
21-75 
77-59 
3-86 
2-97 
2-17 
52-07 
760 
3-00 
2-61 
185 
6-0 
107 
! 31-72 
5-71 
24-12 
77-30 
3-88 
3-29 
2-18 
56-18 
758 
2-50 
2-28 
204 
5-0 
130 
33-31 
5-21 
26-58 
70-91 
3-87 
3-17 
2-21 
57-11 
750 
2-25 
2-12 
230 
150 
] 35-37 
28'56 
70-01 
3-83 
3-32 
2-30 
60-01 
760 
2-00 
1-94 
226 
157 
35-06 
29-27 
63-51 
3-88 
2-99 
2-14 
55-15 
755 
1-75 
1-75 
252 
180 
37-03 
31-30 
60-50 
3-85 
3-00 
2-14 
55-58 
754 
1-50 
1-56 
255 
185 
37-25 
31-72 
54-26 
3-85 
2-71 
1-89 
49-10 
760 
1-35 
1-44 
305 
240 
40-73 
36-14 
54-71 
3-72 
2-99 
2-21 
59-41 
756 
1-25 
1-36 
310 
245 
41-06 
36-50 
52-14 
3-70 
2-89 
2-08 
56-48 
764 
1-10 
1-24 
315 
260 
41-20 
37-61 
47-70 
3-74 
2-63 
1-94 
51-87 
766 
1-00 
1-16 
315 
264 
41-20 
37-89 
44-62 
3-59 
2-46 
1-80 
50-01 
750 
•90 
1-07 
285 
238 
j 39-37 
35-98 
39-33 
3-06 
2-07 
1-46 
47-71 
765 
•80 
•99 
235 
205 
35-75 
33-39 
33-04 
2-50 
1-58 
1-12 
44-80 
760 
•75 
•94 
208 
185 
33-64 
31-30 
29-52 
2-48 
1-33 
•92 
37-09 
755 
•65 
•85 
98 
87 
23-09 
21-75 
18-32 
1-08 
•567 
■385 
35"64 
760 
•60 
•81 
50 
45 
16-49 
15-64 
12-47 
1-08 
•275 
•184 
17-03 
700 
*55 
•76 
30 
25 
12-77 
11-68 
9-07 
‘43 
•155 
•094 
21-86 
752 
•50 
•72 
12 
10 
8-07 
7-37 
6-36 
•46 
•069 
•034 
7-39 
•40 
•65 
5 
4 
5-21 
4-66 
3-16 
, . 
' -0221 
•0109 
2-37 
CO 
11-50 
12 
12-0 
* * 
8-07 
8*07 
86-64 
•937 
•• 
•• 
