from The Century Dictionary.
- noun A channel for the passage of air.
- noun plural Channels underneath the hearths or in the brickwork of the walls and fire-bridges of reverberatory furnaces, designed to protect the foundations from the intense heat of the furnace as well as to preheat the air entering the furnace.
Sorry, no etymologies found.
Bill Tooley's limp body hanging across a stout timber brace, which, extending from side to side of the shaft and firmly bedded in its walls at each end, had been left there by the miners who cut this air-channel.
And to make it worse, there is the air-channel, and the only air channel.