"Ctesibius's clepsydra from the 3rd century BC. Clepsydra, literally water thief, is the Greek word for water clock."

"Ctesibius's clepsydra from the 3rd century BC. Clepsydra, literally water thief, is the Greek word for water clock."

‘Certain necessary directions as well for the cure of the plague…’, Royal College of Physicians (1665)...

‘Certain necessary directions as well for the cure of the plague…’, Royal College of Physicians (1665)...

Sand Glass, Half-Hour  Date: first quarter 16th century Culture: German Medium: Bronze-gilt and silver-gilt

Sand Glass, Half-Hour Date: first quarter 16th century Culture: German Medium: Bronze-gilt and silver-gilt

Fragment of Headdress                                                                                      Period:                                        Qing dynasty (1644–1911)                                                          Date:                                        late 17th–early 18th century                                                          Culture:                                        China

Fragment of Headdress Period: Qing dynasty (1644–1911) Date: late 17th–early 18th century Culture: China

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