1080 
DR. C. W. SIEMENS ON THE DTNAMO-ELECTRIC-CURRENT. 
No. 7. 
Helix: 24 part commutator, 336 convolutions, 2 - 5 m.m. wire, *4014 S. U. resistance. 
Electro-magnets: 512 convolutions, 5 - 5 m.m. wire, '3065 S. U. resistance. 
j Revolutions 
j per minute. 
Resistance in S. U. 
Reading on 
electro¬ 
dynamometer. 
Current 
in 
webers. 
E. M. F. 
in 
volts. 
Horse-power. 
Percentage 
of energy 
turned 
into useful 
work. 
In 
outer 
circuit. 
Total 
in 
circuit. 
Expended. 
Total 
developed. 
Developed 
in outer 
circuit. 
602 
4-5 
5-21 
•246 
3-5 
4-21 
, , 
•491 
590 
3'0 
3-71 
I 
2-33 
8-07 
•602 
•0252 
•0203 
3-372 
602 
25 
3-21 
16 
9-32 
27-93 
•676 
•349 
•2725 
40-31 
606 
2-0 
2-71 
60 
18-06 
45-69 
1-113 
1-106 
•816 
73-31 
602 
1-75 
2-46 
105 
23-90 
54-89 
1-72 
1-760 
1-25 
72-67 
600 
1-5 
2-21 
140 
27-59 
56-93 
2-20 
2110 
1-429 
64-95 
590 
1-25 
1-96 
170 
30-41 
55-65 
2-53 
2-27 
1"45 
57-31 
600 
1-0 
1-71 
270 
38-32 
61-18 
3-43 
3-14 
1-84 
53-64 
620 
•85 
1-56 
378 
45-34 
66-04 
443 
401 
2-18 
49-21 
•75 
1-46 
400 
46-64 
63-57 
4-68 
3-97 
2-05 . 
43-80 
>9 
•60 
1-31 
505 
52-41 
64-11 
5-06 
4"50 
2-06 
40-71 
No. 8. 
Helix: 24 part commutator, 336 convolutions, 2'5 m.m. wire, '4014 S. U. resistance. 
Electro-magnets: 512 convolutions, 5’5 m.m. wire, ‘3065 S. U. resistance. 
Revolutions 
per minute. 
Resistance in S. U. 
Reading on 
electro¬ 
dynamometer. 
Current 
in 
webers. 
E. M. P. 
in 
volts. 
Horse-power. 
Percentage 
of energy 
turned 
into useful 
work. 
In 
outer 
circuit. 
Total 
in 
circuit. 
Expended 
Total 
developed. 
Developed 
in outer 
circuit. 
715 
45 
5-21 
•365 
698 
3-5 
4-21 
4 
4-66 
18-32 
•427 
•114 
•095 
22-25 
700 
3-0 
3-71 
21 
10-69 
37-03 
1-43 
•530 
•429 
30‘00 
710 
2-5 
3-21 
50 
16-49 
49-42 
1-59 
1-09 
■682 
42-89 
680 
20 
2-71 
105 
23-91 
60-50 
2-64 
1-94 
1'43 
54-16 
690 
1-75 
2-46 
165 
29-96 
6311 
3-94 
2-76 
1-98 
50-25 
708 
1-5 
2-21 
210 
33-80 
69-75 
3-90 
3-16 
2-14 
54-87 
685 
1-25 
1-96 
270 
38-32 
70-13 
4-47 
3-60 
2-30 
51-45 
686 
1-0 
1-71 
380 
45-46 
72-58 
5-04 
4-42 
2-59 
51-29 
720 
*85 
1-56 
550 
54-69 
79-66 
6-46 
5-14 
3-18 
49-22 
•75 
1-46 
620 
58-07 
79-16 
6-76 
6-16 
3-16 
46-74 
■60 
1-31 
680 
60-83 
74-41 
705 
607 
2-78 
39-43 
99 
•50 
1-21 
900 
69-97 
79-05 
7-72 
7-42 
3-06 
39-63 
