Полезное:
Как сделать разговор полезным и приятным
Как сделать объемную звезду своими руками
Как сделать то, что делать не хочется?
Как сделать погремушку
Как сделать так чтобы женщины сами знакомились с вами
Как сделать идею коммерческой
Как сделать хорошую растяжку ног?
Как сделать наш разум здоровым?
Как сделать, чтобы люди обманывали меньше
Вопрос 4. Как сделать так, чтобы вас уважали и ценили?
Как сделать лучше себе и другим людям
Как сделать свидание интересным?
Категории:
АрхитектураАстрономияБиологияГеографияГеологияИнформатикаИскусствоИсторияКулинарияКультураМаркетингМатематикаМедицинаМенеджментОхрана трудаПравоПроизводствоПсихологияРелигияСоциологияСпортТехникаФизикаФилософияХимияЭкологияЭкономикаЭлектроника
Roman roads
| http://pochemy.net/?n=559 |
Without doubt, the champion road builders were ancient Romans, who, until modern times, built the world’s straightest, best engineered, and most complex network of roads in the world. At their height, the Roman Empire maintained 53,000 miles of roads, which covered all of England to the north, most of Western Europe, radiated throughout the Iberian Peninsula, and encircled and crisscrossed the entire Mediterranean area. Famous for their straightness, Roman roads were composed of a soil foundation topped by four courses: a bedding of sand or mortar; rows of large, flat stones; a thin layer of gravel mixed with lime; and a thin surface of flint-like lava. Typically they were 3 to 5 feet thick and varied in width from 8 to 35 feet, although the average width for the main roads was from 12 to 24 feet. Their design remained the most sophisticated until the advent of modern road-building technology in the very late 18th and 19th centuries. Many of their original roads are still in use today, although they have been resurfaced numerous times.
| http://ezhe.ru/ib/issue1008.html |
Under Roman law, the public had the right to use the roads, but the district through which a road passed was responsible for the maintenance of the roadway. This system was effective so long as a strong central authority existed to enforce it. Unfortunately, as the Roman Empire declined so did their roads and their work fell into disrepair all across Europe and Great Britain.
Date: 2015-12-12; view: 1079; Нарушение авторских прав; Помощь в написании работы --> СЮДА... |