Hourglass
Videos
An hourglass is a device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated flow of a substance from the upper bulb to the
German half-hour sand glass, first quarter of the 16th century, bronze-gilt and silver-gilt, height: 8.3 cm, diameter: 8.4 cm, Metropolitan of Art (New York City)
Antique sandglasses
Sarcophagus dated c. 350, representing the wedding of Peleus and Thetis (with magnification of an hourglass held by Morpheus)
Temperance bearing an hourglass; detail Lorenzetti's Allegory of Good Government, 1338
Marine sandglass
Videos
A marine sandglass is a timepiece of simple design that is a relative of the common hourglass, a marine instrument known since the 14th century. Sandglasses were used to measure the time at sea or on
Hourglass
…the first documented example dates from the 14th century, a depiction in the 1338 fresco Allegory of Good Government by Ambrogio Lorenzetti. Use of the marine sandglass has been recorded since the 14th century. The written records about it were mostly from logbooks of European ships. In the same period it appears in…
1859 Helmsman's marine sandglass, in a four-column wood stand
Dotzè del Crestià (Valencia – 1484)