122 PRELIMINARY REPORT ON COAL-TESTING PLANT, [bull. 261 
that with more thorough washing a coke of good quality might b< 
obtained. The charge of washed coal weighed 9,800 pounds, wai 
burned for 65 hours, and produced 5,731 pounds of coke, a a percentag< 
yield of 58.5. This coke was also soft and high in ash. 
Alabama No. 2. — Lump, nut, and pea coal from mine No. 5, Gallo 
way Coal Company, Carbon Hill, Ala. 
The coal used in this test was unwashed, the charge weighing 8,00( 
pounds. It coked imperfectly in small pieces, which were very soft 
and which were mixed with charred coal and ash. The coal is higl 
in ash (13.04 per cent), but if properly washed may yield a coke oj 
fair grade. 
Arkansas No. 1. — Lump and nut coal from mine No. 3, Centra 
Coal and Coke Company, Huntington, Ark. 
The charge consisted of 8,075 pounds of unwashed coal, which showe( 
no tendency to coke and burned to ash. The volatile constituent] 
are too low to make coke in the beehive oven. If properly washec 
this coal may make coke in a retort oven. It is high in ash (13.01 pe: 
cent) and also somewhat high in sulphur. 
Arkansas No. 2. — Lump coal from mine No. 12, Central Coal an< 
Coke Company, Bonanza, Ark. Same result as obtained fron 
Arkansas No. 1. 
Arkansas No. 3. — Lump and slack coal from mine No. 18, Westeri 
Coal and Mining Company, Jenny Lind, Ark. This was an experi 
mental charge of a small amount of briquettes made from unwashe( 
coal and placed in an oven with a coking coal. The briquettes con 
tained 6 per cent of hard pitch and they produced a dense coke higl 
in ash. 
Arkansas No. 6. — Slack coal from mine No. 18, Western Coal an< 
Mining Company, Jenny Lind, Ark. 
The behavior of these two coals in the ovens was practically th 
same as that of Arkansas No. 1, except that No. 6 was washed and th 
percentage of ash shows a noticeable reduction. 
The charge for a second test consisted of equal parts of unwashe 
coal crushed and mixed with 8 per cent of hard pitch, and the saimi 
material made into briquettes on the English machine. The additio l 
of the pitch, by increasing the volatile matter, caused the coal 1: 
fuse and produced coke. The coke, however, was very dark and he 
large cells. The test is interesting, since it shows that a natural) 
noncoking coal may be made to coke by an addition of pitch. Th j 
charged weighed 8,000 pounds, was burned 42 hours, and yield< ( 
4,056 pounds of coke and 539 pounds of breeze and ash. 
Illinois No. 1. — Lump and nut coal from mine No. 1, Weste. i 
Anthracite Coal and Coke Company, O'Fallon, 111. 
« Exclusive of 352 pounds of breeze and ash. 
