12 



A. DA1GGER & COMPANY, CHICAGO, U. S. A. 



APPARATUS FOR TESTING COAL TAR AND REFINED TARS, 

 OILS AND PITCHES DERIVED THEREFROM 



As adopted in the Standard Methods of the Barrett Manufacturing Company, 

 New York. See Journal of Industrial and Engineering Chemistry, April, 1911, March, 

 1913, and May, 1914. The apparatus listed below is only the special apparatus re- 

 quired for these tests. The regular apparatus, such as tripods, burners, clamps, etc., 

 are to be found under their respective headings throughout the catalogue. Complete 

 lists of both the special and regular stock apparatus required for the various tests will 

 be sent upon request. 



1085 



1086 1087 1089 1091 



1088 



SPECIAL APPARATUS REQUIRED FOR WATER IN TAR TEST 



1085 CONDENSER TROUGH, of copper, on supports, with wooden base $ 8.00 



1086 CONDENSER TUBE, of glass to fit Condenser Trough No. 1085 30 



1087 SEPARATORY FUNNEL, with stopcock, capacity, 120 c.c 3.00 



1088 COPPER STILL, with steel clamps, inside dimensions, 6x3^ inches, 



with six paper gaskets 15.25 



1088a COPPER STILL, Same as No. 1088, but larger size, i. e., inside dimen- 

 sions, 7^x5 inches 19.50 



1089 RING BURNER, brass, to fit small Still No. 1088 1.90 



1089a RING BURNER, brass, to fit large Still No. lOSSa 3.25 



1090 CONNECTING TUBE, of glass 25 



SPECIAL APPARATUS REQUIRED FOR SPECIFIC GRAVITY TEST 



1091 SPECIFIC GRAVITY BOTTLE, Barrett modification of the Hubbard 



form, 50 c.c. capacity $ 1.90 



