A sundial shows the time by displaying the position of a shadow on a (usually) flat surface, which has markings that correspond to the hours.
Sundials can be horizontal, vertical, or in other orientations.
A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is a harmonic oscillator, meaning it swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates.
An hour glass , also known as a sandglass, sand timer, sand watch, sand clock, or egg timer, measures the passage of a few minutes to an hour of time. …Hourglasses»»
A pulsar clock is a clock which depends on counting radio pulses emitted by pulsars. …Pulsar Clock»»
Cool Kitchen Wall Clocks
These wall clocks are printed with an AcryliPrint®HD process to ensure the highest quality display, and beautifully vibrant colors that will stand the test of time. Many can be customized with your name or favorite saying. These wall clocks will be a great addition to any kitchen, and would make a timeless (sic) housewarming or wedding gift. …Cool Kitchen Wall Clocks»»
Symbolic uses of the hourglass
Unlike most other methods of measuring time, the hourglass concretely represents the present as being between the past and the future, and this has made it an enduring symbol of time itself. …Symbolic uses of the hourglass»»