1881.] Spectrum on the Haloid Salts of Silver, fyc. 



169 



LgI+AgN0 3 on paper 



.. Print. 



Print. 



... Print. 



Lgl on paper washed from Print. 

 excess of AgN0 3 and treated 

 with KN0 2 . 



Lgl on. paper washed from Print. 

 AgN0 3 soaked in NaCl, 

 washed from excess and 

 exposed with KNO„. 



'aper floated on AgN0 3 ... Print. 



Lgl on paper washed from Print. 

 excess of AgN0 3 , ruddy tint. 



|AgI on paper washed from Print. 

 excess of AgN0 3 , treated 

 with KI and KNO„ ; or 

 Agl in collodion. 



|AgI + AgN0 3 in albumen ... Print. 



|AgI prepared in hath treated Developed 

 with KI, washed, redipped (long 

 in silver hath, developed exposure), 

 with pyrogallic acid. 

 IDitto ditto ... ... (short 



exposure). 



Agl purified and exposed in Developed 

 presence of sensitiser, de- (long 

 veloped by acid or alkaline exposure), 

 developer. 



IDitto ditto (short 



exposure). 



Agl unpurified, treated and Developed 

 developed as above. (l° n g 



exposure). 



Ditto 



ditto 



(short 

 exposure). 



[Agl •with trace of AgCl or Developed 

 AgBr, developed by acid or (long 

 alkaline method. exposure). 



Ditto 



ditto 



(short 

 exposure). 



[Agl + AgX0 3 in albumenised Developed. 

 collodion, or on paper 

 washed, acid development. 



[Agl + AgN0 3 in albumenised Developed. 

 collodion, or on paper 

 washed, ferrous citrate 

 developer. 



[AgI+AgN0 3 prolonged ex- Developed. 

 posure. 



n2 



