Search our collection

Clear all filters
Image
Category
Maker
Object type
Place
Material
Date
Model of an Ozonometer, improved form, designed in 1865 by Smyth with cardboard box.

Smyth's revised ozonometer

1865
Two ozonometers and 2 diagrams of ozonometers, 1864.

Two ozonometers, components and diagrams

1864