iNSTur.Mi.vrs AND CHEMICAL T 



TABU-: I. COATS o\ CnAI, 



503 



HKMAHKH 



Si i,-; N, t. 



White . . 



White . , 



White . . 



White . . 



White . . 



White 



Yellow, 

 while hot; 

 white, cold 



Yellow, 

 while hot ; 

 white, cold 



Yellow, 

 while hot ; 

 white, cold 



Yellow 



Yellow 



Brown to 

 yellow . . 



Red 



At considerable distance from assay; 

 easily volatile in (). F. ; in K. F. 

 yields a garlic-like odor 



At considerable distance from assay; 

 volatile in R. F., tinging the flame 

 yellowish green 



At considerable distance from assay ; 

 volatile in R. F., tinging the flame 

 an intense green 



Volatile in either flame, coloring the 

 flame green 



Silvery luster, very volatile ; the 

 outer edge may be reddish ; im- 

 parts an azure blue color to the 

 flame 



Due to chlorides, sulphates of lead 

 bismuth, zinc, mercury, etc. They 

 are identified by other tests 



Volatile in R. F., quickly becoming 

 blue ; in O.F. volatile, leaving a 

 copperlike film on the coal 



Very near the assay, not volatile in 

 O. F., but slowly in R. F. ; treated 

 with cobalt solution, blue-green 



Very near the assay, not volatile in 

 O. F., but slowly in R. F. ; treated 

 with cobalt solution becomes green 



May have an outer edge of white, 

 volatile ; the substance treated with 

 von Kobell's flux yields a lemon- 

 yellow coat 



May have an outer edge of white, 

 volatile; the substance treated 

 with von Kobell's flux yields a 

 brick-red coat 



Yellow border and iridescent where 

 thin ; volatile 



Generally preceded by a yellow or 

 white coat 



Arsenious oxide, 



Antiinonious oxide, 



Thallium oxide, 

 T1 2 O rare, 



Tellurous oxide, 

 TeO z 



Selenious oxide, 



Molybdenum tri- 

 oxide, MoOt 



Tin oxide, 

 SnO 2 



Zinc oxide, 

 ZnO 



Lead oxide, 

 PbO 



Bismuth oxide, 

 Bi,O, 



Cadmium oxide. 

 CdO 



Silver with lead 

 or bismuth 



