from The Century Dictionary.
- noun A size of broken coal suitable for use in a hot-air furnace or the like, as distinguished from a smaller size called ‘chestnut’ used in a kitchen range or stove, and a still smaller size called ‘pea-coal.’
Sorry, no etymologies found.
My gifts do not run to the care of a horse and an egg-coal fire.
Dwellers in Arcady The Story of an Abandoned Farm Albert Bigelow Paine 1899