1839.] 



On Chemical Tests. 



349 



TABLE OF EE-AGENTS. 



To be used in conjunction with the foregoing Alphabetical List of Tests 



1 Ammonia, 



2 9 , carbonate. 



3 „, hydrc-3ulphuret. 



4 Copper, metallic. 



5 Galls, tincture. 



6 Iron, metallic. 



7 protosulphate. 



8 Mercury cyanuret. 



9 „ protonitrate. 



10 Muriatic acid. 



11 Muriates. 



12 Oxalic acid. 



13 Oxalates. 



14 Potash. 



15 ,, carbonate. 



16 chromate. 



17 bi-carbonate. 



18 bin-oxalate. 



19 Potash, iodide. 



20 prusslate. 



21 red prussiate, 



22 Soda, phosphate. 



23 Sulphuric acid. 



24 Sulphates. 



25 Sulphuretted hydrogen, 



26 Tin, proto-muriate. 



27 Zinc, metallic. 



Alumina — Numbers 1, 2, 3, 14, 15, 17, 22 of the above tests produce a 

 voluminous precipitate. 12,20,21 and 25 produce no preci- 

 pitate. 



Antimony — 1, 2, 12, 14, 15, 17, 20, 22 produce white precipitates, 3,25 

 produce a red, or orange precipitate, 27 precipitates metallie 

 antimony in a black powder. 



Arsenic — 25, produces a bright yellow precipitate ; but see the article 

 No. 39, in the foregoing dictionary of tests. 



Baryta— 2, 15, 22, 23, 24 produce a white precipitate ; 14 and 17 also 

 if the solution is concentrated. 1, 3, 20,21 produce no preci- 

 pitate, neither does 12, but if the solution be very concentrated 

 a precipitate appears after some time. 



Bismuth—1, 2, 14, 15, 17, 20, 22 white precipitates— 16, 21, yellow pre- 

 cipitates— 3, 25 black precipitates — 19, browm precipitate — 12 

 crystalline precipitate after some time— 27 metallic precipi- 

 tate of black powder — 5 produces an orange precipitate. 



Cadmium— 1, 2, 12, 14, 15, 17, 22 produce white precipitates. 20 white 

 passing into faint yellow. 3, 21, 25 yellow precipitate 27, 

 metallic precipitate of small glancing grey spangles, or dendri- 

 tical leaves. 



Cerium— 1, 2, 3, 12, 14, 15, 17, 20, 22 produce white precipitates. 21, 

 25 produce no precipitate. Hydrosulphurets produce a brown 

 precipitate becoming deep green. Accum. 



Chromium — 1, greyish blue precipitate. 2, 3, 14, 15, 17, 22 light green 

 precipitates. 16 deep brownish yellow precipitate. 25 no 

 precipitate. 12, 20, 21 no precipitate. 5 brown precipitate, 

 (Prussiates, green precipitates, Accum). 



