


Photographic Lens
1845-1890

Water-flow meter
1870-1900

Water-flow meter by Secretan of Paris
1870-1900

Symmetrical lens
circa 1880

Aplanat or Simple Landscape Lens.
circa 1890

Square Bellows Wet-Plate Camera, with Lens Cap
1860

Dew-point hygrometer by Secretan
1845-1900

Achromatic Compound microscope
1845-1900

Current flow meter
1850
Daguerreotype lens
Lerebours and Secretan landscape lens
sliding body mahogany camera
1835-1855
Lerebours et Secretan lens c. F:14 inches
Lerebours and Secretan landscape lens
Lerebours and Secretan lens
Lerebours and Secretan Petzval lens
Folding Plate Camera with Darkslides and Adaptor
1845-1890
Wooden Sliding Box Camera
1850