Prof. R. Bunsen on Flame Reactions. 

 can be reduced as Films. 



99 



Iodide-film. 



Iodide-film 

 with ammonia. 



Sulphide-film. 



Sulphide-film 

 with ammo- 

 nium-sul- 

 phide. 



Brown ; disappears Disappears 

 for a time on altogether 

 breathing. on blowing. 



Brown; does not 

 wholly disappear 

 on breathing. 



Orange-red to yel- 

 low ; disappears 

 on breathing. 



Orange-yellow ; 

 disappears for a 

 time on breath- 

 ing. 



Black to black- 

 ish brown, 



Disappears for 

 a time. 



Does not dis- 

 appear on 

 blowing. 



Yellow to 

 orange. 



Orange, and 

 then disap- 

 pears for a 

 time. 



Disappears al- 

 together on 

 blowing. 



Orange. 



Disappears for 

 a time. 



Disappears al- 

 together on 

 blowing. 



Lemon-co- 

 loured. 



Does not dis- 

 appear. 



Elements whose 

 reduction-films 

 are scarcely dis- 

 solved in dilute 

 nitric acid. 



Bluish brown; thin 

 parts pink ; dis- 

 appears for a time 

 on breathing. 



Pink to orange; 

 chestnut-co- 

 loured when 

 blowing. 



Burnt-umber 

 colour to 

 coffee-co- 

 loured. 



Carmine-coloured 

 and lemon-yel- 

 low; does not 

 disappear on 

 breathing. 



Lemon-yellow ; 

 does not disap- 

 pear on breath- 

 ing. 



Diappears for 

 a time on 

 blowing. 



Black. 



Does not dis- 

 appear on 

 blowing. 



Black ; thin 

 parts bluish 

 grey. 



Does not dis- 

 appear. 



Does not dis- 

 appear. 



Does not dis- 

 appear. 



Elements whose 

 reduction-films 

 are with diffi- 

 culty dissolved 

 in dilute nitric 

 acid. 



Orange-yellow to 

 lemon-colour ; 

 does not disap- 

 pear on breath- 

 ing. 



Disappears for 

 a time on 

 blowing. 



Brownish red 

 to black. 



Does not dis- 

 appear. 



White. 



White. 



Lemon-co- 

 loured. 



Does not dis- 

 appear. 



White. 



White. 



White. 



Does not dis- 

 appear. 



Yellowish white. 



Yellowish 

 white. 



White. 



H2 



Does not dis- 

 appear. 



Elements whose 

 reduction-films 

 are instantly 

 dissolved in di- 

 lute nitric acid. 



