The sewage question : comprising a series of reports being investigations into the condition of the principal sewage farms and sewage works of the kingdom / from Dr. Letheby's "Notes and chemical analyses".

Licence: Public Domain Mark

Credit: The sewage question : comprising a series of reports being investigations into the condition of the principal sewage farms and sewage works of the kingdom / from Dr. Letheby's "Notes and chemical analyses". Source: Wellcome Collection.