鉄道が時計を標準化した経緯についての講義

論拠、口調、推論

1. b) How a shared national time replaced local time標準時がどのようにして生まれたか、その一因が鉄道だったことを説明しています。
2. c) Journeys were so slow that small differences were not noticed馬車は何日もかかったので、数分の食い違いは道中で失われていました。
3. b) It showed both times truthfully but confused everyone地方時とロンドン時間の両方を正直に表示していたので読みにくく、この発言は皮肉です。
4. c) A timetable requires everyone to share one clock分単位で交わした約束は、全員が同じ時計で分を数えている場合にのみ成り立ちます。
5. b) No law required them to change, and some were proud or suspiciousその取り決めには法的な強制力がなかったので、町は自由に拒否でき、誇りや頑固さから拒否したところもありました。
6. c) It could send the exact time to every station at once電線を伝わる信号が、観測所から全駅へ正確な時刻を運べたと述べています。
7. b) A shared experience tied to a place and a sky地方の正午は、場所と空に結びついた共有の体験だったと述べています。
8. c) It becomes so familiar that it seems always to have existed人々はすぐに、時計はずっとそうだったと言うようになり、その発明はもはや新しいものとは見られなくなりました。

重要な細部

1. ten / 10ブリストルはおよそ10分遅れていたと述べています。
2. fourteen / 14エクセターは約14分遅れていたと述べています。
3. 1840 / eighteen fortyその会社は1840年にロンドン時間を採用しました。
4. 1880 / eighteen eightyそれは1880年だったと述べています。
5. sun町は太陽に合わせて時計を設定していました。
6. minuteそれには2本の分針が付けられていました。

Doctor Marsh: Today I want to talk about something so ordinary that we have stopped noticing it: the fact that, in this country, a clock in the north and a clock in the south agree. This was not always so, and the story of how it came about is, I think, a small masterpiece of unintended consequences.

Doctor Marsh: Until the middle of the nineteenth century, every town set its clocks by the sun. Noon was whenever the sun stood highest overhead, and since the sun reaches that point later as one travels west, Bristol ran roughly ten minutes behind London, and Exeter about fourteen. Nobody found this alarming. A coach took days to complete a journey, and a few minutes of disagreement between two distant towns was simply lost on the road.

Doctor Marsh: The railways changed that, not because anybody wished to reform timekeeping, but because a timetable is a promise made in minutes. A train that left London at nine could hardly arrive at a western station by a clock that insisted it was ten past. Passengers missed trains they had reached early. Station staff kept two sets of times. At least one famous clock in the west of England was fitted with two minute hands, one for local time and one for London time, which must have made it the most honest and least useful instrument in the county.

Doctor Marsh: Consider the practical difficulty. A traveller arriving from a town further east would find that the station clock disagreed with the church clock, which in turn disagreed with the jeweller's window, and each of these authorities had its defenders. Shopkeepers, in particular, were reluctant to alter hours that their customers had always understood.

Doctor Marsh: One company adopted London time along its whole line in eighteen forty, and others followed over the next few years. Yet the arrangement had no legal force. For decades a town could set its own time and be perfectly entitled to do so, and some did, out of pride, or stubbornness, or a suspicion that the capital was getting above itself. It was only in eighteen eighty that a law made one standard time official throughout the country. The telegraph helped enormously, since a signal sent along the wires could carry the exact time from an observatory to every station at once.

Doctor Marsh: It would be tempting to call this progress and leave it there. But notice what was surrendered. Local noon had been a shared experience, tied to a place and a sky. Standard time replaced it with an agreement, and agreements are only as strong as the habits that sustain them. Within a generation, people were saying that the clock had always been like that, which is exactly how an invention succeeds: by being forgotten as one.

Doctor Marsh: So the next time you glance at your watch, spare a thought for the passengers who missed trains they had reached early. They paid, in a very literal way, for a convenience you take entirely for granted.