ON SOME N.S.W. TAN-SUBSTANCES. 

 QUALITATIVE TESTS, (Dilute Extract)— continued. 



101 



14 



15 



16 



17 



Mercuric Chloride. 



Ammoniun Molybdate 

 in Nitric Acid. 



Potassium ferrocyanide 



Zinc Acetate. 



Abundant yellow 



Darkens liquid 



Slight whitish-brown 



Dense cafe au lait 



ochre ppt 





ppt which increases 

 on standing 



ppt 



ditto 



ditto 











No change ; slight 



Dense purplish-grey 







purplish-brown ppt 



gelatinous ppt 







on standing 





Abundant dark sal- 



ditto 



ditto 



ditto 



mon ppt 









No change 



ditto 



No change ; liquid 



becomes turbid on 



standing 



No change, orange 



Olive-brown ppt 









ditto 



ditto 



Slight yellowish- 







ppt on standing 



white ppt 



ditto 



ditto 



Marked turbidity ; 

 slight purplish-white 

 ppt on standing 



Light brown ppt 



Cloudiness 



ditto 



No change 



Turbidity ; yellowish 

 flocculent ppt on 

 standing 



No change 



ditto 



No change other than 



Dark reddish-brown 







the formation of two 



ppt, forming an upper 







layers, a light and a 



layer in the test-tube 







darker one ; on stand- 









ing there forms a 







, 



slight orange-brown 









ppt, uniformly dis- 









tributed 





Turbidity 



ditto 



Slight turbidity ; 



Abundant light 







pure purplish- brown 



purple ppt 



Slight turbidity 



ditto 



ppt on standing 

 No change, cloudi- 



Same as A. rigens, 







ness on standing 



but without the 

 tendency to separate 



Turbidity 



ditto 



Slight turbidity ; 



into layers 



Ppt little lighter 







light purplish-brown 



than that yielded by 



ditto 





ppt on standing 



A. vestita 



ditto 



No change ; dirty 



Whitish-brown ppt 







drab ppt on standing 





No change 



ditto 



No change ; faint 



Ppt a shade lighter 







cloudiness on stand- 



than A. pendula 



Turbidity 



ditto 



ing 



Same as A. vestita 



Same as A. vestita 



Ppt a little darker 

 in colour than that 

 of E. macrorrhyncha 



ditto 



ditto 



No change ; faint 



Turbidity ; orange- 







cloudiness on stand- 



red granular ppt on 







ing 



standing 



