What is an hourglass?

Houring hours is a non -technical tool that is used to maintain time. They usually measure the course of the lesson, although the individual can be designed to measure different units of time. Some measures only a few seconds, for example, while others measure minutes and some even measure days. It has two hollow bulbs connected through a narrow opening. The bulbs contain sand that flows through the opening between the upper and lower bulbs. When all the sand fell to the lower bulb, a special amount of time has passed.

The hourglass usually, but not always, has a stand that closes the glass bulbs. Suspension of the device in the stand provides a stable base and can be easily rotated and time without leaving fingerprints on the glass. The stands can be made of wood, glass, metal or plastic. Various Stands patterns are endless, from simple to ornamental with everything in between.

matching were invented sometime in the 14th century. Before the flavorOLDE mechanical hours, where they are commonly used, among other things, for maritime purposes, cooking and timing of worship. Since each indicates only one time, we can imagine that our ancestors had to have a large collection of hours. One remarkable one achieved fame in the classic book and film wizard Oz . The tension filled with scenes in which the hourglass is thrown away by the hope of Dorothy to rescue, a device familiar to many generations.

Today in board games is often used hours of hourglass to indicate a series of player or until the task period. They can also be a fun way of daily work and other tasks. Well made can also make beautiful collectible pieces because of their elegant style and variation in design.