COAL-TAK AND WATER-GAS TAR CREOSOTES. 



25 



the coals used in by-product ovens were a mixture of two or more 

 coals, as is customary in this industry. 



These samples were collected from the States of Rhode Island 

 Massachusetts, Connecticut, New York, Pennsylvania, Delaware, 

 Maryland, Ohio, Illinois, Missouri, Wisconsin, and Alabama. They 

 represent fairly this country's total production of coal tar. 



Table 9. — Coal tars used in experimental ivork. 



Tar 

 num- 

 ber. 



Kind of retort or oven. 



Kind of coal. 



Temperature. 



1 



Horizontal retort 



do 



do 



do. 



do 



do 



do 



do 



do 



do 



do 



Youghiogheny 



White to cherry. 

 Cherry. 

 Do. 



2 



do 



3 



..do 



4 



...do 



Do. 



5 



...do 



Orange. 



6 



.do ... . 



Cherry. 

 Red. 



7 



Westmoreland 



8 



do 



Cherry. 

 Do. 



9 



do 



10 



...do 



White. 



11 



.do 



White to Cherry 

 Orange. 



12 



do 





13 



do 



do 



Do. 



14 



do. . 



Mixed 



Cherry. 

 Orange. 

 Red. 



15 



do. 



. ..do 



16 



do 



...do 



17 



Inclined retort. . 



Westmoreland 



Cherry. 

 Do. 



18 



....do. 



...do 



19 



do. 



...do 



Do. 



20 



do 



do 



Orange. 



21 



.. ..do. 



Mixed 



Cherry. 

 Do. 



22 



do. 



..do 



23 







Do. 



24 



Otto oven ^ 



Native 



1,100 to 1,300° C. 



25 



.do. 



Fairmont 





26 



..do. 



Mixed 





27 



....do. 



do 





28 



do 



do 





29 



Semet-Solvay 



WestmorelandandPocahontas 

 Mixed 





30 



..do. . 





31 



...do. 



do 





32 



do. 



West Virginia 





33 



.do. 



MLxed 





34 



...do. 



Alabama 





35 





. .do 













The samples of water-gas tar were taken for the most part at 

 plants making both water gas and coal gas, but a number were col- 

 lected from plants using only the water-gas process. They were 

 taken from the same States as the coal-tar samples, and fairly repre- 

 sent the production of this kind of tar east of the Mississippi River, 

 if not of the whole country. Table 10 indicates the number of the 

 water-gas tars, the kind of oil used, the temperature regulation, and 

 whether the plant manufactures coal gas also. 



