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

 QUALITATIVE TESTS, (Dilute Extract)— continued. 



211 





S 





10 



One drop of strong sul- 



phuri c acid to one drop 



of extract on a white 



glazed tile. 



Add Amnionic Chloride 



Copper Sulpate. 



Add Ammonia. 



Pale dirty yellow ppt. 



Dark olive-brown ppt. 



Dark olive-brown ppt. 

 in aboundance. 



Yellowish colour. 



Salman coloured ppt. 



Dark purplish-grey 



precipitate . 



Vandyke-brown ppt. 



Light brown colour. 



Yellow ppr.. 



Light olive-green ppt. 



Dark brown ppt. 



Bright yellow colour. 



Eusset-brown ppt. 



Brown precipitate. 



No change. 



Light brown colour. 



Whitish-brown ppt. 



Ditto. 



No change. 



Ditto, but less intense. 



Abundant purplish- 

 grey precipitate. 



Purplish-grey ppt. 



Abundant Vandyke- 

 brown precipitate. 



Purplish-brown colour 



Ditto. 



Ditto. 



Ditto. 



Ditto. 



Ditto. 



Ditto. 



Ditto. 



Ditto. 



Ditto; but in smaller 

 quantity. 



Brown precipitate, 

 with a faint purplish 

 tint. 



Brown precipitate. 



Umber-brown ppt. 



Light brown colour. 



Orange-brown ppt. 



Ligbt brown ppt. 



Yellow ochre colour. 



No change ; oran'g e- 

 brown precipitate 

 on standing. 



Ditto ; but in very 

 slight quantity. 



Olive-brown ppt. 

 Dark brown ppt. 



Ditto. 

 Ditto. 



Ditto ; but in smaller 

 quantity. 



Very slight brownish 

 colour. 



Orange-brown ppt. 



Ditto. 



Vandyke-brown ppt. 



Slight brownish colour 



Yellow precipitate of 

 an olive tint. 



Turbidity. 



Olive-brown ppt. 

 Brown precipitate. 



Very deep olive-brown 

 precipitate (almost 

 bronze-green). 



Redissolves. 



No change. 

 Hardly any change. 



Brown ppt. 



Dark brown ppt. 



Olive-green ppt. 



Yellow colour. 



Light olive-brown ppt. 



Light brown ppt. 



Dark brown ppt. 



Bright yellow colour. 



Very slight reddish- 

 brown precipitate . 



Flesh-coloured ppt. 



Purplish-brown ppt. 



Light reddish-brown 

 colour. 



Slight flesh-coloured 

 precipitate. 



Dark brown ppt. 



No change. 



Ditto. 



Eeddish-brown ppt. 

 Ditto. 



Dark reddish-brown 

 precipitate inclining 

 to Sienna. 



Dark brown ppt. 



Vandyke-brown ppt. 

 Ditto. 



Ditto. 



Ditto; but more 

 intense. 



Light orange-brown 

 precipitate. 



Sienna precipitate. 



Purplish-brown ppt. 



Light brown colour. 



Ditto. 



Dark brown ppt. 



No change. 



Ditto. 



