nyomtáv Következmények szalvéta candle clock udvar Mindenható tilt
Almost Unschoolers: Candle Clock for Kids
The Candle Clock of the Swordsman – The Book of Knowledge of Ingenious Mechanical Devices
Candle clock hi-res stock photography and images - Alamy
Candle clock - Free time and date icons
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
Candle Clock Ink Sketch On Old Stock Vector (Royalty Free) 2091119158 | Shutterstock
A photograph of a candle clock, a thin candle with consistently spaced markings, that when burned, indicate the passage of periods of time. Dated 20th century Stock Photo - Alamy
The Timekeeping: The Evolution Of Clocks and Watches.