A complete treatise on the art of retouching photographic negatives : and clear directions how to finish & colour photographs (1898)
Johnson, Robert · London : Marion · leaf 173
AD VERTISEMENTS 139 THE ACTINOQRAPH. (HURTER & DRIFFIELD'S PATENT.) … for calculating the correct Photographic iiiiiiiii I I iiiiiiuiiiii I iiiiiiiiiiiiHiiiii iiiiiiii i iiiiiiiii I I iiiiiirr Exposicre for aiiy SPBCO OP PLAZQ NURIEB S DRirPLELDS ACII hour 071 any day of PATENT NO 5S4S IB SObC ACENT^ the year in all parts of the world. It is now made for the THE…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-491-286.webp)
