Final answer:
George Eastman did not discover silver-nitrate as the best way of capturing images. His notable contributions to photography include a system for developing pictures for amateurs, an inexpensive camera, and developing flexible film.
Step-by-step explanation:
The contribution of George Eastman that was not among his innovations in popularizing photography for ordinary people was d- Discovered silver-nitrate as the best way of capturing images. George Eastman's contributions included a- Devising a system for developing pictures that other people, usually amateurs, took, b- Introducing a cheap, easy-to-use camera, and c- Developing a flexible roll of film.
These advancements made photography accessible to the masses, with the Kodak camera's iconic slogan, "You press the button, we do the rest", emphasizing ease of use and widespread availability introduced in the Kodak Brownie.