"Impure water is vaporized in the boiler, A. It travels to the vat and down pipe R where it condenses and distilled water finally collects at the bottom. Cold water enters the vat at P and warm water at the top escapes at Q." —Quackenbos 1859
G. P. Quackenbos A.M. A Natural Philosophy: Embracing the Most Recent Discoveries in the Various Branches of Physics, and Exhibiting the Application of Scientific Principles in Every-day Life (New York: D. Appleton and Company, 1859) 212
