Since retail can be the canary in the coal mine for the broader economy, there's real reason to be anxious.
The Pike River coal mine is about 50 miles northeast of Greymouth and is in a steep mountainous area.
And what if they're only the canary in the coal mine for doctors and MBAs and government workers?
The aforementioned stories may very well be legitimate, but let's consider them a sort of canary in the coal mine.
Captain Will Hallam had recently bought this coal mine on a little branch railroad in the interior of Illinois.
Why wouldn't we be allowed to sink a coal mine in our own counthry?
"A coal mine without miners," responded my uncle, a little severely.
The coal miner, not owning the coal mine, must agree to work for wages.
One coal mine we went to was high up, 700 feet straight up from the sea, and amid pretty scenery.
Give the method of reconnoitering the buildings at the waterworks and coal mine.