By what were the first London Underground trains pulled?

steam locomotives
diesel locomotives
electric locomotives
horses
Ven­ti­la­tion shafts at various points on the route allowed the engines to expel steam and bring fresh air into the tunnels. These shafts were some­times hidden behind false facades, like the one on the photo (Le­in­ster Gardens 23). The right-­hand property is a fake.

Answers distribution

steam locomotives
diesel locomotives
electric locomotives
horses
answers
flagSpain
62%
12%
0%
25%
16
flagItaly
60%
0%
5%
35%
20
flagBelgium
54%
9%
0%
27%
11
flagGermany
51%
9%
4%
34%
85
flagthe Philippines
50%
7%
7%
28%
14
flagPoland
49%
8%
5%
36%
7712
flagthe United Kingdom
48%
6%
4%
40%
366
flagSweden
46%
15%
7%
30%
13
flagthe United States
45%
8%
7%
36%
193
flagIndia
44%
15%
20%
18%
70
flagRepublic of Ireland
44%
0%
0%
55%
18
flagCanada
41%
5%
11%
41%
17
flagAustralia
37%
12%
6%
43%
16
flagthe Netherlands
35%
11%
0%
52%
17
flagNorway
25%
16%
25%
33%
12
flagUkraine
20%
0%
10%
70%
10
flagFrance
20%
0%
10%
70%
10

Gender

men40%
women45%
steam locomotives
40%
45%
diesel locomotives
7%
9%
electric locomotives
4%
6%
horses
46%
38%

Language versions

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answers
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By what were the first London Underground trains pulled?
520
49%

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Author: Luca Biaggi
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