![Roman History on Twitter: "Roman alarm clock. When the candle burns, the wax round the nail melts and it clatters into the metal plate. http://t.co/jIjraTFOqm" / Twitter Roman History on Twitter: "Roman alarm clock. When the candle burns, the wax round the nail melts and it clatters into the metal plate. http://t.co/jIjraTFOqm" / Twitter](https://pbs.twimg.com/media/CISshH8WgAAfHsa.jpg)
Roman History on Twitter: "Roman alarm clock. When the candle burns, the wax round the nail melts and it clatters into the metal plate. http://t.co/jIjraTFOqm" / Twitter
![Before the invention of clocks, "candle clocks" were used. They would burn for set amount of hours. If one wanted an alarm, you would stick a nail into the desired time length Before the invention of clocks, "candle clocks" were used. They would burn for set amount of hours. If one wanted an alarm, you would stick a nail into the desired time length](https://preview.redd.it/avb23k5oo3h61.png?auto=webp&s=8f7d6b772f3eb0b4fd4c4b44fb597914dd9ac9a5)
Before the invention of clocks, "candle clocks" were used. They would burn for set amount of hours. If one wanted an alarm, you would stick a nail into the desired time length
![Massachusetts fire officials urge candle safety after three-alarm fire in Brockton injures 7 – New Bedford Guide Massachusetts fire officials urge candle safety after three-alarm fire in Brockton injures 7 – New Bedford Guide](https://www.newbedfordguide.com/wp-content/uploads/2023/02/candle.jpeg)