140 PRELIMINARY REPORT ON COAL-TESTING PLANT, [bull. 261, 
be used to advantage for hardening- purposes as well as for its binding 
qualities. It has been used with lime and pitch, and good briquettes 
were made from this combination. In using rosin and pitch as a 
binder it was found that a smaller percentage of these two together 
was required to give either as good or a better briquette than when 
pitch was used alone. In burning there is little or no odor from the! 
rosin, although there is some tendency to smoke. 
ASPHALT. 
The asphalt used in the experimental work consisted of a California 
refined asphaltum of grade B, which is designated throughout this 
report asphalt Bl. Another asphalt product used is known as 
u kopak" No. 30, manufactured by the Raven Mining Company, ofi 
Texas, and is of a rubbery consistency. This is known as asphalt BM 
An asphaltic pitch manufactured by the Standard Oil Company at one« 
of its Texas plants also was used, and it is known as asphalt BM 
Crude asphalt from Indian Territory is known as asphalt BJf. Thi 
asphalt is altogether too hard, approaching close to a coke, and con 
taining but a very small percentage of volatile matter. 
A soft asphalt was received from the Gulf Refining Company o 
Port Arthur, Tex., and is designated throughout this report as/>Jud' 
BS. An analysis of this asphalt by Mr. E. E. Somermeier was a 
follows: 
Analysis of soft asphalt from the Gulf Refining Company. 
Per cen 
Moisture 0. C 
Volatile matter 80. 
Fixed carbon 19. 1 
Ash 0. ( 
Total 100. ( 
Another soft asphalt was furnished by Mr. John McNeil from Ca. 
per, Wyo., and is known throughout this report as asphalt B6. It 
a soft, tough asphalt, which on cooling to about 40° became brittl 
An analysis by Mr. E. E. Somermeier gave the following results: 
Analysis of asphalt from Casper, Wyo. 
Per ce 
Moisture 
Volatile matter 78 
Fixed carbon 20. JP 
Ash 0. 1 
Total 100, 
PETROLEUM. 
Petroleum, of both paraffin and asphaltum bases, can sometimes jiftj 
used to advantage in briquetting. On account of lack of time lug 
little experimenting was done with the petroleums. Those that hrfc 
