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Marine sandglass - Sand Timer With Compass - Antique Hourglass - 15830100012

An hourglass (or sandglass, sand timer, sand watch, or sand clock) 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 trickle of material (historically sand) from the upper bulb to the lower one. Factors affecting the time interval measured include sand quantity, sand coarseness, bulb size, and neck width. Hourglasses may be reused indefinitely by inverting the bulbs once the upper bulb is empty.

Marine Sandglass –

A marine sandglass is a timepiece of simple design that is a relative of the common hourglass, a marine (nautical) instrument known since the 14th century (although reasonably presumed to be of very ancient use and origin). They were employed to measure the time at sea or on a given navigational course, in repeated measures of small time increments (e.g., 30 minutes). Used together with the chip log, smaller marine sandglasses were also used to measure the boat speed through the water in knots.



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Marine sandglass - Sand Timer With Compass - Antique Hourglass - 15830100012

  • Product Code: 15830100012
  • Availability: Out Of Stock
  • Rs.800.00

Tags: marine sandglass, sand timer with compass, antique hourglass, 15830100012