What does the expression canary in the coal mine mean?
an early warning of danger
Canary in the coal mine. Meaning. Someone/something that is an early warning of danger. Examples.
What does the idiom canary mean?
—used to say that someone looks very proud or satisfied about something he or she has done After pointing out his teacher’s mistake, he smiled like the cat that ate the canary.
Why did they use canaries in coal mines?
How did canaries help coal miners? They protected them from a danger that lurks in the mines—carbon monoxide (CO). This is an odorless, toxic gas. CO can cause dizziness, loss of consciousness, and even death in humans and animals.
What happened to canaries in coal mines?
Canaries were iconically used in coal mines to detect the presence of carbon monoxide. The bird’s rapid breathing rate, small size, and high metabolism, compared to the miners, led birds in dangerous mines to succumb before the miners, thereby giving the miners time to take action.
Do they still use canaries in mines?
Canaries were finally phased out in 1987 as new detection technology was developed. England, the last country to use them, officially replaced the birds with electronic (and featherless) methane and CO monitors, by then more effective and precise than any living creature.
What is a coal miner called?
1. coal miner – someone who works in a coal mine. collier, pitman. miner, mineworker – laborer who works in a mine.
Who discovered coal first in the world?
Coal was one of man’s earliest sources of heat and light. The Chinese were known to have used it more than 3,000 years ago. The first recorded discovery of coal in this country was by French explorers on the Illinois River in 1679, and the earliest recorded commercial mining occurred near Richmond, Virginia, in 1748.
How did they use canaries in mines?
Toxic gases Canaries were iconically used in coal mines to detect the presence of carbon monoxide. The bird’s rapid breathing rate, small size, and high metabolism, compared to the miners, led birds in dangerous mines to succumb before the miners, thereby giving the miners time to take action.
What happened to the canary in the coal mine?
carried small vials of oxygen with them so that they could revive a poisoned bird. Because female canaries were not considered good singers, they were sold more cheaply than males and so regularly found their way into mines.
What gas were canaries used for in mines?
carbon monoxide
Canaries were used in mines from the late 1800s to detect gases, such as carbon monoxide. The gas is deadly to humans and canaries alike in large quantities, but canaries are much more sensitive to small amounts of the gas, and so will react more quickly than humans.
What is a canary in a coal mine?
canary in a/the coal mine Something or someone who, due to sensitivity to his, her, or its surroundings, acts as an indicator and early warning of possible adverse conditions or danger. Refers to the former practice of taking caged canaries into coal mines. The birds would die if methane gas became present and thereby alert miners to the danger.
What does the idiom Canaries in the mines mean?
This idiom relates to the caged birds (canaries) that miners would carry into the mines. Dangerous gases in the mines (such as carbon monoxide) would kill the canaries before the miners, therefore providing an advance warning to the miners.
What is the meaning of Canaries?
canary in a coal mine. Something or someone who, due to sensitivity to his, her, or its surroundings, acts as an indicator and early warning of possible adverse conditions or danger. Refers to the former practice of taking caged canaries into coal mines.
Why was John used as a canary in the movie?
The birds would die if methane gas became present and thereby alert miners to the danger. Wildlife in disaster movies assumes the role of the canary in a coal mine, fleeing the scene when catastrophe is imminent. Unaware that he had been given the test drug, John was used as a canary in a coal mine to see its effects on the human mind.