This section is from the book "A Treatise On Beverages or The Complete Practical Bottler", by Charles Herman Sulz. Also available from Amazon: A Treatise On Beverages.
Fig. 30. - Sectional View of Natural Stone Pressure Filter.
The capacity of either of these filters is given at 500 to 1000 gallons per day, according to size and form.
The stoneware filters are adapted where a mechanical filtration of the water is sufficient. They will remove suspended impurities in more or less time.