Daguerre invented photography with what?

Daguerre photography, also known as "silver plate photography", is a method to develop the exposed silver salt coating by using mercury vapor, which is called silver salt method.

Daguerre photography was initiated by Frenchman Daguerre. It is a direct positive method that appears on silver-plated copper plates and cannot be printed and reproduced. It is the earliest photography method with practical value in the history of photography.