For the reading comprehension challenged the OP made a reference to Sergey Prokudin-Gorsky, who was one of the pioneers of color photography.

From the article referenced:

Prokudin-Gorsky's own research yielded patents for producing colour film slides and for projecting colour motion pictures. His process used a camera that took a series of three monochrome pictures in sequence, each through a different-coloured filter. By projecting all three monochrome pictures using correctly coloured light, it was possible to reconstruct the original colour scene. Any stray movement within the camera's field of view showed up in the prints as multiple "ghosted" images, since the red, green and blue images were taken of the subject at slightly different times.

The early part of the 20th century was one of the best eras for photography. Prokudin-Gorsky captured state of the art in engineering feats made by a population of humble people seeming from another era, most of whom worked in fields.

Over a hundred years later and the major changes are kinds of fields in which the majority work, and, of course, how images are made.

Thanks for the post!

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