Chamberland filter

The core of the porcelain is made up of a metal pipe with holes through which water flows out and is collected.

The original intention was to produce filtered water, free of bacteria, for use in Pasteur's experiments.

They sold filters to private homes, hotels, restaurants, and the 1893 Chicago World's Columbian Exposition.

[4] Use of the Pasteur-Chamberland filter led to the discovery that diphtheria and tetanus toxins, among others, could still cause illness even after filtration.

The discovery that biological entities smaller than bacteria existed was important in establishing the field of virology.