clinkers

Whaley was recognized in June by The Tennessee Advisory Committee on Arson as the state's arson investigator of the year for work that centered on "clinkers" - hard, rock-like residue left behind after hay burns at high temperatures.

Tennessean.com Dickson

There are also small bricks called clinkers, chiefly used for stable paving.

Scientific American Supplement, No. 601, July 9, 1887

It has a heavy percentage of human "clinkers," sometimes in the front pews, sometimes in the pulpit.

The Next of Kin Those who Wait and Wonder

British soldiers were not much better off than we were, for they were limited to bully-beef and "clinkers," though they frequently supplemented their larder by stores from Boer farms, such as fowls, pigs, &c., and had salt, sugar, and coffee in abundance.

My Reminiscences of the Anglo-Boer War

Several British convoys fell into our hands, but the food we found on them consisted usually of bully-beef and "clinkers," things which only dire necessity drove us Boers to eat.

My Reminiscences of the Anglo-Boer War

Some of them, unequally expanded, strained and twisted; its grate-bars and fire-box had become choked with "clinkers," and its tubes charged with coke.

The Iron Horse

One simply cannot ignore the "clinkers," whatever one makes of the overall performance.

Truthdig: Drilling Beneath the Headlines

Analysis of heat-fused rock "clinkers" shows that coal fires are an ancient phenomenon.

Christian Science Monitor | All Stories

I use hardwood with coal to keep the temperature up in the firebox (more efficient), and because the coal is reduced completely to ash with no "clinkers" to deal with.

VideoHelp.com Forum

"clinkers"; it is therefore called "caking" coal, and is not only well adapted for use as fuel and steam-making, but it is also a good smelting coal.

Commercial Geography A Book for High Schools, Commercial Courses, and Business Colleges