196 



HALL AND SMITH— COLUMBIUM. 



[May , 9> 



Reagent. Ta. 



Codeine, No color, 



Morphine, Faint yel- 

 low, 

 Resorcinol No color, No color 



Naphthol (/?) 



Naphthol («) 



Pyrogallol, 



Salicylic acid, 



Cinchonidine, 



Apomorphia, 



Narceine, 



Bebeerina, 

 Narcotina, 



Cb. Ti. \V. 



No color, Faint pink ; may Light brown ; on stand- 



be due to mor- ing trace purple, 

 phine, 

 Red to brown ; Gray brown, becoming 



very delicate, purple, ll.fi ppt. 

 Red brown ; No color, 

 fairly delicate, 

 Faint yellow Coffee brown ; Brown, becoming dark 



brown very delicate, blue. 



Faint brown, Green to dark Deep blue ; very deli- 

 greenish brown, cate. 

 Yellow to Dull dark red, Deep red to brown to 



light brown, dirty blue. 



Very faint Deep red, Reddish yellow. 



yellow, 

 No color, No color, On standing a slight 



purple. 

 Yellow brown, Light red brown, Purple to brown to green 



• and blue. 

 Brownish yel- Brown, Dirty dark green. 



low, 

 No color, Clear brown, Dark brown to green. 



Yellow, Brown, Light brown to green. 



Strychnia, quinidia, cinchonidine and atropia gave no color with 

 any of the elements tested. Narceine and bebeerina alone in sul- 

 phuric acid gave a considerable color, and with them the amount 

 of reagent used must be very small or it will obscure any change 

 produced by the addition of the double fluoride. In this connec- 

 tion it is of interest to note that Levy (C. R., 103, 1074 and 

 1 195) studied the colors produced by the phenol-like bodies, dis- 

 solved in concentrated sulphuric acid, when brought in contact 

 with the oxides of titanium, tin, tantalum, columbium and other 

 elements, with the following results. Columbium could be tested 

 for in the presence of all the others by using codeine, as it gave 

 a pink color, while titanium yielded no color and tantalum 

 but a faint green. Titanium could be tested for by using mor- 

 phine, with which it gave a carmine color, columbium no color 

 and tantalum a yellow color passing into brown. Tantalum with 

 resorcinol gave a dirty green color, changing to amethyst and rose, 

 while titanium yielded a flesh red color going to chocolate brown, 

 and columbium a yellowish tint. None of the results were dupli- 



