Niepce

Daguerre employed it also, and, as it appears, with far more promise of success than any obtained by M. Niepce.

About the year 1820 Nicéphore Niepce made the discovery that bitumen, under certain conditions, was sensitive to light.

Niepce afterward employed metal plates instead of the stone.

The notion that light possesses a magnetizing power on steel was upset by Niepce de St. Victor in 1861.

Later Daguerre became associated with Niepce and the famous daguerreotype was the result.