Replaced Old English dægmæl, from dæg "day" + mæl "measure, mark" (see meal (n.1)). The Latin word was horologium; the Greeks used a water-clock (klepsydra, literally "water thief"). Image of put (or set) the clock back "return to an earlier state or system" is from 1862. Round-the-clock (adj.) is from 1943, originally in reference to bomber air raids.
A: There’s always going to be a sleep-related study going on, but you might be surprised to find that it’s not a one-size-fits-all answer. There’s about 1% of the population, known as The Sleepless Elite, who don’t need to clock-in a bunch of hours with their pillows. Some of us just run better off of less sleep, even if we don’t realize it right away. There’s such a thing as oversleeping, too, so how do you really know your specific sleep needs?
Sure, it looks harmless, but Poweriever Bluetooth 32L will blast your tunes until there is no tomorrow. When you want to connect to your alarm clock to play your favorite music, you’ve met your match in terms of an alarm clock. You get a reactive light bar to turn on when you touch it, as well as a rechargeable battery that ensures you won’t be left without your alarm, even when there’s a power failure in the middle of the night. Your boss doesn’t care—you still have to get in on time. Make every minute count with this premier electric alarm clock.
As stylish as it is functional, this lovely clock lends a touch of charm and classic appeal to your tabletop display. A traditional design, it showcases a rounded frame with a pedestal base and a solid black finish. The neutral-toned clock face is accented with black Roman numeral numbering and three thin black hands. Crafted from plastic, it is a budget-friendly choice. It also features a beeping alarm for added convenience.

Many devices can be used to mark passage of time without respect to reference time (time of day, minutes, etc.) and can be useful for measuring duration or intervals. Examples of such duration timers are candle clocks, incense clocks and the hourglass. Both the candle clock and the incense clock work on the same principle wherein the consumption of resources is more or less constant allowing reasonably precise and repeatable estimates of time passages. In the hourglass, fine sand pouring through a tiny hole at a constant rate indicates an arbitrary, predetermined, passage of time. The resource is not consumed but re-used.
The late Roman statesman Cassiodorus (c. 485–585) advocated in his rulebook for monastic life the water clock as a useful alarm for the 'soldiers of Christ' (Cassiod. Inst. 30.4 f.).[4] The Christian rhetorician Procopius described in detail prior to 529 a complex public striking clock in his home town Gaza which featured an hourly gong and figures moving mechanically day and night.[4]
This farmhouse wall clock measures 36 in. across This farmhouse wall clock measures 36 in. across the face and features horizontal cedar wood slats a white distressed finish hand painted black Roman numerals in a Poster Condensed font and an inner accent ring with individual hour marks. It includes a high torque quartz movement antique-style spade hands and ...  More + Product Details Close
Although the mechanisms they use vary, all oscillating clocks, mechanical, digital and atomic, work similarly and can be divided into analogous parts.[64][65][66] They consist of an object that repeats the same motion over and over again, an oscillator, with a precisely constant time interval between each repetition, or 'beat'. Attached to the oscillator is a controller device, which sustains the oscillator's motion by replacing the energy it loses to friction, and converts its oscillations into a series of pulses. The pulses are then counted by some type of counter, and the number of counts is converted into convenient units, usually seconds, minutes, hours, etc. Finally some kind of indicator displays the result in human readable form.

Simple clocks intended mainly for notification were installed in towers, and did not always require faces or hands. They would have announced the canonical hours or intervals between set times of prayer. Canonical hours varied in length as the times of sunrise and sunset shifted. The more sophisticated astronomical clocks would have had moving dials or hands, and would have shown the time in various time systems, including Italian hours, canonical hours, and time as measured by astronomers at the time. Both styles of clock started acquiring extravagant features such as automata.

A: This is difficult because it works differently for everyone involved. If you’re just not able to wake up properly, then you’re probably what most of us are: tired from the constant stress of life and trying to sleep it off to a healthy level. It’s exhausting, all of life. Waking up faster and feeling fuller right when you hit the ground is a must, and it’s difficult. Here’s what to do:

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A. Like many items today, the amount you’ll pay for an alarm clock depends on how much technology you want layered onto it. If you desire nothing but a simple analog alarm clock that rouses you with a single tone, you could spend as little as $10. A slightly more sophisticated clock radio might cost $20 or so. If you want a deluxe digital alarm clock with screen projection, Bluetooth capability, MP3 player, or other cool features, you’re looking at a price of anywhere from $40 to $90.
Exuding vintage appeal, this striking oversize wall clock rounds out rustic ensembles or lends a timeworn touch to modern spaces. Encased in wrought iron, this design features a wood face bearing distressed details and roman numerals tied together by spade-style hands. One AA battery (not included) keeps this design keeping time. Measuring 32'' W x 32'' H x 1'' D, it's sure to grab glances no matter where it's placed.

Emerson alarm clock radio features relaxing sounds that help you unwind and fall asleep faster. Perfect for bedrooms, baby nurseries, spas, salons, apartments, offices and anywhere where unwanted disturbing or intrusive noise is a problem. The noise sound machine can help block out distractions and promote relaxation prior to sleep to provide you with a more peaceful, restful night sleep. Sounds include ocean side, rain, rain forest, summer night, tide and noise. With features such as a...
The ancient Greek philosopher Plato (428–348 BC) was said to possess a large water clock with an unspecified alarm signal similar to the sound of a water organ; he used it at night, possibly for signaling the beginning of his lectures at dawn (Athenaeus 4.174c).[2] The Hellenistic engineer and inventor Ctesibius (fl. 285–222 BC) fitted his clepsydras with dial and pointer for indicating the time, and added elaborate "alarm systems, which could be made to drop pebbles on a gong, or blow trumpets (by forcing bell-jars down into water and taking the compressed air through a beating reed) at pre-set times" (Vitruv 11.11).[3]

The tick duration must be positive. If it has a part smaller than a whole millisecond, then the whole duration must divide into one second without leaving a remainder. All normal tick durations will match these criteria, including any multiple of hours, minutes, seconds and milliseconds, and sensible nanosecond durations, such as 20ns, 250,000ns and 500,000ns.


Stay punctual with an alarm clock! They are great for waking you up in the morning or simply reminding you of special events. These items are a household must-have! Perfect for bedside nightstands, most alarm clocks feature a built-in FM radio to enjoy your favorite radio station, as well as a snooze button for when you need 5 to 10 minutes more sleep. iHome? clock radios have dock for MP3 players to listen to music through the speakers. Choose from a variety of unique, creative designs that are great for virtually any d‚cor.
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