Printed brochure titled ' A Scientific Treatise on Scalebuoy Process of Water Treatment. Top of front page has a green bulb at the top with the title underneath. Brochure gives the history of the Scalebuoy, the fundamental principles, use and a summary of the Scalebuoy method of water treatment. Written by R. H. S. Abbott.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, a scientific treatise on scalebuoy process of water treatment, scalebuoys (new zealand) ltd, r h s abbott, herald printing works auckland