XVI CONTENTS. 



PAGE 



Instantaneous photographs, . . . . 364 

 Latent image: development, V. . . . 365 

 Negatives and positives, . _ . . . 365 

 Daguerreotype, . . . . 367 

 Intensification and reducing, . . '. . 367 

 Silver prints from natural objects, negatives, &c., . 369 

 Photo enlargements, . .... - . 372 

 Toning prints, . . , . . . 373 

 Ferrotype, . .' .. . . . 374 

 Platinotype, . ^ -. . ,. . 375 

 Chromatised gelatin process : carbon process, . . 375 

 Photographic printing : Woodburytype, photolitho- 

 graphy, collotypes, . , - . . , 378 

 Other kinds of chemical action produced by actinic rays, 380 

 Fluorescence, . , : , v "- . . . 382 

 Phosphorescence : chemical and physical, . . V 382 



