COKTNG TESTS. 87 
Arkansas No. 9. — Test 99: No coke produced; ashed down about 4 inches. 
Test 101: No coke produced; ashed down about 6 inches. 
Test 102: Soft, dense, punky coke; drawn from oven in large and small chunks. 
Test 103: Soft, dense, punky coke; drawn from oven in large and small chunks; 
high yield of breeze, due to large amount of coal whose volatile was expelled, 
not sticking together; 5 per cent of pitch not sufficient for this coal. 
Georgia No. 1. — Test 173: Poor, dense coke; large pieces of irregular size; ash high; 
probably reduced ash and materially improved by washing. 
Illinois No. 7 D. — Test 1: Good, hard coke with medium cell structure; breakage 
straight and long. This was the first charge after firing ovens, and results were 
not as good as might be expected. 
Test 4: Light-gray and silvery color; metallic ring; cell structure good; breakage 
somewhat marred by cross fracture, but pieces of good size; good, strong coke, 
much improved by washing. 
Illinois No. 11 D. — Test 5: Light-gray and silvery color; metallic ring; cell structure 
good.; breakage, good long pieces; good, strong coke. 
Illinois No. 13. — Test 2: Dull-gray color; cell structure good; breakage marred by 
cross fracture, probably due to successive charging of small portions. ^ 
Test 3: Dull-gray color; cell structure small; cross breakage more pronounced than 
from washed coal. 
Illinois No. 16. — Test 7: Accident to charging larry necessitated discontinuing test. 
Coal burned to keep oven hot. 
Test 10: Dull-gray color; cell structure small. 
Illinois No. 19 A. — Tests 11, 15, and 19: No coke produced; the whole charge was 
burned and volatile was expelled, but the residue would hot bind together. 
Illinois No. 20. — Test 106: Dull-gray color; cell structure small; breakage bad; sepa- 
rate and distinct cross fracture all over oven, coking in layers; ash and sulphur 
high. 
Test 107: Dull-gray color; some little deposit of carbon; metallic ring; cell 
structure small, but not dense; breakage somewhat marred by cross fracture; 
pieces of good size; great improvement over former test; ash and sulphur high. 
Illinois No. 21. — Test 126: No coke produced. 
Test 137: Burned very vigorously for 12 hours, afterwards falling off rapidly to small 
candles all over surface of charge; when pulled, after 45 hours, product was mix- 
ture of unburned coal and slightly coherent mass of coal of original size showing 
no trace of cell structure; all volatile apparently expelled. 
Illinois No. 22 B. — Test 117: Dull-gray color; cell structure medium; breakage very 
irregular, probably owing to high amount of slate; poor coke; heavy clinker 
over whole surface; ash and sulphur high. 
Test 118: Light-gray color; upper 12 inches fingered, two 6-inch sections below 
in chunks; upper 12 inches had metallic ring and good cell structure; the remain- 
ing coke poor. This oven was held 72 hours on account of accident. Under 
more favorable conditions, the whole charge would have probably been better 
coke. Ash and sulphur high. 
Illinois No. 23 A. — Test 111: Light-gray color; some silvery deposit of carbon; cell 
structure a little large; breakage large-fingered pieces; metallic ring; ash and 
sulphur high. 
Illinois No. 23 B.— Test 112: Light-gray color; a little silvery deposit of carbon ; metal- 
lic ring; cell structure a little large; breakage, long, thin pieces; larger charges 
would probably make better coke; ash and sulphur high. 
Test 114: Light-gray color; a little silvery deposit of carbon; metallic ring; cell 
structure good; breakage, long, thin pieces and largo 6-inch chunks; bottom 
very hot; bottom 6 inches probably coked upward; ash and sulphur high. 
