M. C. Lea on Triethylm 



Antimony, terchlorid, 



Molybdenum, protochlorid, 



" bichlorid, 



Chromium, potash chrome a 



Manganese, protosulphate, 



nediate precipitate. The liquid 

 ;v'er soon begins to darken, and 

 ;ck precipitate falls, which grad- 



Reddish broi 

 Abundant yellow crys' 



Srown, insoluble ii 

 Uue precipitate o 

 redissolves in e; 

 The precipitate 

 a large excess ( 



i of the alkaloid. 



iturated aqueous 

 mine, was filtered 



and the filtrate 



ence of copper. 

 Brownish white, ii 



precipitant. 

 Whi 

 Whi 



iia, which gave n 

 ication of the pre 



pitate, insoluble in e 

 pitate, insoluble in e 

 the precipitant. 



Reactions ivith Hydrofiuosilicic Acids, 

 Aqueous triethylamine treated with ordinary hydrofiuosilicic 

 ^cid, HFl, SiFI^, gives, when the alkaloid is in excess, a precipi- 

 tate which readily dissolves in an excess of the acid. 



vVith Knop's hydrofiuosilicic acid 2HF1, Si^Fl, no immediate 

 precipitate is form'ed even when the alkaloid is in excess, but 

 ^fter standing some hours, it becomes a slightly opalescent but 

 almost transparent jellv so stiff that the test glass may be in- 

 serted without spilling It. 



Ohservations on these Reactions— 1 have already pointed out 

 J^oat the property of redissolving precipitates of alumina, hereto- 

 Jore considered as characteristic of ethylaraine, is shared by 

 "oth diethylamine and methylamine, and expressed the opinion 



,, * ilethylamine also precipitates solutions of this salt. My correction of the con- 

 : number of this Journal (p. 369) reached the editom when 

 r advanced to alter it. 



