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Форум на SMEHA.net Форум на SMEHA.net 2006-05-26T21:57:55+03:00 https://cassvensi.net/feed.php?f=4&t=612 2006-05-26T21:57:55+03:00 2006-05-26T21:57:55+03:00 https://cassvensi.net/viewtopic.php?t=612&p=7319#p7319 <![CDATA[В чем секрет популярности песочных часов]]> Статистика: Добавлено Гость — Пт май 26, 2006 9:57 pm


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2006-05-26T21:49:03+03:00 2006-05-26T21:49:03+03:00 https://cassvensi.net/viewtopic.php?t=612&p=7306#p7306 <![CDATA[В чем секрет популярности песочных часов]]> Статистика: Добавлено nightAngel — Пт май 26, 2006 9:49 pm


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2006-05-26T18:44:19+03:00 2006-05-26T18:44:19+03:00 https://cassvensi.net/viewtopic.php?t=612&p=7289#p7289 <![CDATA[В чем секрет популярности песочных часов]]> Статистика: Добавлено Гость — Пт май 26, 2006 6:44 pm


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2006-05-26T14:13:51+03:00 2006-05-26T14:13:51+03:00 https://cassvensi.net/viewtopic.php?t=612&p=7238#p7238 <![CDATA[В чем секрет популярности песочных часов]]>
Научные разработки в области технологии производства стекла позволили выпускать колбы с гладкими внутренними стенками, что дало возможность песку максимально равномерно перетекать из верхней части в нижнюю. Точность "хода" часов зависела и от самого песка. Его изготавливали из обожженного мелкозернистого песка или из жареных перетертых яичных скорлупок, или из цинковой и свинцовой пыли.

На протяжении сотен лет песочные часы не раз пытались усовершенствовать. Так, астроном Тихо Браге заменил песок ртутью, Стефан Фарфлер и Гроллье де Сервье изготовили пружинные механизмы для переворачивания часов. Но все эти новшества не прижились. А вот простейшими песочными часами люди пользуются и по сей день.

Статистика: Добавлено nightAngel — Пт май 26, 2006 2:13 pm


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