British Journal of Photography showing the Kodak steps

This advertisement for the first Kodak camera shows its operation step by step, including processing.
When all 100 pictures had been exposed, the camera was sent to the Eastman Company, where they
removed the film, processed the pictures, and then mailed the snapshots back along with the camera
with another roll of film inside. This was the birth of the global photofinishing industry, which made
George Eastman a millionaire.