1881.] Spectrum on the Haloid Salts of Silver, fyc. 177 



AgCl + AgN0 3 on paper 



AgCl + AgX0 3 on p iper, slight Print. 

 preliminary exposure. 



AgCl on paper washed from Print. 

 excess of AgNO,. 



AgCl on paper washed and Print. 

 treated with NaCl and 

 washed again, also collodio 

 chloride of silver, also yellow 

 form of AgCl in gelatine. 



I Grey form of AgCl in gela- Print. 

 tine. 



| AgCl in collodion in presence Developed 

 of excess of AgN0 3 or NaCl (long 

 developed; ferrous curate, exposure), 

 or acid development. 



>itto ditto (short 



exposure). 



Yellow form of AgCl in gela- Developed 

 tine acid or ferrous citro- (long 

 oxalate development. exposure). 



Ditto 



ditto 



(short 

 exposure). 



Grey form of AgCl in gelatine, Developed 

 acid, or ferrous citro-oxalate (long 

 development. exposure). 



Ditto 



ditto 



(short 

 exposure). 



AgCl in collodion given a Developed. 



short preliminary exposure, 



acid, or ferrous citro-oxalate 



development. 

 AgI + AgBr+AgN0 3 on paper, Print. 



Agl + AgBr, washed from Print. 

 AgX0 3 . 



Ditto, ditto, developed ferrous Developed. 

 citro-oxalate. 



Agl + AgBr + AgN0 3 , wet Developed, 

 plate, developed acid, or 

 alkaline developer. 



Agl+AgBr in gelatine, deve- Developed. 

 loped ferrous oxalate. 



AgBr + Agl in collodion, acid Developed 

 or alkaline developer. (long 

 exposure). 



Developed 



(short 

 exposure). 



Print. 



Ditto 



ditto 



3AgI+AgBr, on paper 



