ratt.1 BRIQUETTING TESTS. 159 
,verage, 6.77 pounds each. The eggettes made from this same mixture 
veve stronger than the briquettes, had a polished surface, but were 
r ery brown in color. In the cook stove they burned very satisfac- 
orily, without crumbling hardly at all. 
KANSAS. 
Kansas No. < 2. — Two tons of this coal were briquetted with 11 per 
ent of pitch X. The pitch of the mixture, in passing through the 
nachine from the pug mill to the press, set so quickly that the 
>riquettes did not receive the necessary pressure. The surface was 
ough, and a great many cracks were developed. No more of this 
oal was available for briquetting after receiving pitch of the better 
[ualities. It is, however, a coal that will briquette very readily with 
)itch of the better grades, such as pitch D or pitch H. It requires 
bout 7 per cent of either for commercial briquettes. 
KENTUCKY. 
Kentucky No. 1. — This coal is a good coking coal, but is unusually 
ght in weight and is very lustrous. In passing through the disinte- 
rator it was ground a little too fine, even when using only one side 
f the machine. Then, again, on account of its light weight it was 
iffieult to give it the right pressure on the English machine. The 
oal w T as tested with 6 per cent of pitch D, and the resultant briquettes 
rere clean and black, but not sufficiently pressed to close all the pores, 
'hey were, however, very good briquettes, and would stand rough 
reatment in transportation. They stood weathering with but little 
hange. They weighed on an average 6.15 pounds each. The eggettes 
lade from this same mixture were very smooth and lustrous and as 
brong as any eggettes that have been made on the American machine, 
n the cook stove they burned very satisfactorily without disintegrat- 
ig or giving oil* an excess of smoke. This coal can be briquetted very 
eadily. 
Kentucky No. 2. — As there were none of the good pitches available 
t the time this coal was tested, it was briquetted with 9 per cent 
itch E, which was the percentage determined by laboratory work. 
hree tons of this coal were tested with 9 per cent pitch E. The 
feultant briquettes were extremely pitchy, and on account of the 
xcessive water due to wet steam, these briquettes were difficult to 
andle, and when piled three or four deep they crushed under their own 
r eight. With dried steam the briquettes were more easily handled. 
Ithough still somewhat plastic, they did not crush when piled up. 
(n cooling, the briquettes were very hard, having a lustrous fracture, 
id were capable of standing a great deal of rough handling. These 
riquettes weighed on an average 6.83 pounds each. The eggettes 
