As a Subscriber you will see all 255 images which will give you a far better sense of what was happening within a single year. At the moment you can see 10.
Unidentified photographer / artist, 1878, Polishing the plate, Book illustration, Private collection, LL/33126
Unidentified photographer / artist, 1878, Coating the plate, Book illustration, Private collection, LL/33127
Unidentified photographer / artist, 1878, Sensitizing the plate, Book illustration, Private collection, LL/33128
Unidentified photographer / artist, 1878, Developing the plate, Book illustration, Private collection, LL/33129
Unidentified photographer / artist, 1878, Title page for Charles Garnier, "Le Nouvel Opera de Paris par Charles Garnier, Volume 1", (Paris: Ducher et Cie, 1878), Title page, Source requested, LL/40951
