6 фев 1854 г. - John Snow
Описание:
Snow believed that cholera was caused by dirty water and not miasma. He had authorities remove the handle on a pump on Broad Street in Soho. 60% of the people who drank from this pump had choleraДобавлено на ленту времени:
Дата:
6 фев 1854 г.
Сейчас
~ 171 г назад